Chevrolet engine block casting numbers decoding and Head decriptions

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Chevrolet Engine Block Casting and Identification Numbers

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	Chevrolet Block Casting Number Reference Number Engine M-Blts Year Description Small blocks 140029 350 2 80-84 330817 400 2 72-80 3 frz. plugs 355909 305 2 75 Nova, Monza 360851 262 2 75-76 Monza 361979 305 2 78-79 366245 350 2 78-79 Dipstick in oil pan 366287 4 Bowtie, Alm, siamesed 2 pc. seal,4.00-4.150 bores 2.45 Mains Strt. Nod. Iron Caps 366299 4 Bowtie, Alm., 4.00 bores Nod. Iron Splayed Caps, Wet Sump 376450 350 4 78 389257 302 2 67 393288 283 2 65-67 460703 350 4 78 460776 305 2 78-79 460777 305 2 78-79 460778 305 2 78-79 471511 267 2 79-82 3556519 283 2 58-61 3703524 265 2 55 No oil filter 3720991 265 2 56-57 3731548 283 2 57 No side motor mounts 3737739 283 2 58-64 3756519 283 2 58-62 3782870 327 2 62-67 3789817 327 2 62-67 3789935 283 2 61-64 3790721 283 2 62-64 Chevy II recess oil filter boss 3791262 327 2 62-67 Chevy II recess oil filter boss 3792563 327 2 65 3792582 283 2 64-65 3794226 283 2 58-63 3794460 327 2 68-69 Large Journal Mains 3814660 327 2 68-69 3830944 327 2 63 300 HP 3834810 283 2 64-66 3834812 283 2 62-63 3837739 283 2 58-62 3849852 283 2 64-68 3849935 283 2 65-67 3852174 327 2 62-64 3858174 327 2 64-66 3858180 327 2 64-67 3858618 350 2 68-76 3862194 283 2 65-67 Chevy II recess oil filter boss 3864812 283 2 62-64 3892657 302 2 67 Z-28 Camaro 3892657 327 2 67 3896944 283 2 67 3903352 327 2 67 3914636 307 2 68 3914653 307 2 67-73 3914660 327 2 68 3914678 302 2 68 Z-28 Camaro 3914678 327 2 68 3914678 350 2 68 3932371 307 2 69-73 3932373 307 2 68-73 3932386 302 4 69 Z-28 Camaro 3932386 350 4 69 3932388 350 4 69 3951509 400 4 70-71 3951509 400 2 74-75 2 frz. plugs 3951511 400 4 70-71 3956618 302 4 69 Z-28 Camaro 3956618 327 2 68-69 3956618 350 2 or 4 69 3956632 307 2 69 3959512 327 2 62-63 3970010 302 4 69 Z-28 Camaro 3970010 350 2 or 4 69-80 3970014 350 2 or 4 72 3970020 307 2 70-73 3970041 327 2 65-67 4715511 305 2 80 6259425 350 2 69-76 10036033 350 4 Crate motor, 2 pcs seal, Hecho En Mexico 10051182 2 Bowtie, non siamesed, 3.75 bore 10051184 2 or 4 Bowtie, siamesed, 4.00-4.160 bore 10054727 350 4 Made in Canada 10066036 350 4 Crate Motor, 2 pcs. seal, Hecho En Mexico 10090511 350 2 90 LT-5, ZR1 Vett, 385 HP 10125327 350 4 92-up Gen. II LT1 reverse flow cooling 10125327 350 4 96-up Gen II LT4 reverse flow cooling 10134996 4 Bowtie, Alm, 4.125 bore 2.65 Mains 10153558 350 2 91-92 LT5, ZR1 Vett, 375 HP 10199001 350 4 93-95 LT5, ZR1 Vett, 405 HP 14010201 305 2 80-84 14010202 305 2 80-84 14010203 305 2 80-84 14010207 350 2 or 4 80-85 14010209 350 4 80-85 14010280 267 2 79-82 14011148 350 Roller Cam, 1 pcs seal 14016376 267 2 79-82 14016379 350 2 77-79 14016381 305 2 80-84 14016383 305 2 80-85 14088526 350 Roller Cam 1 pcs seal 14088548 350 4 86-88 Flat tapped 1 pcs seal 14088551 305 2 86-87 Flat tappet 1 pcs. seal 14093627 305 2 87-91 Roller Cam 1 pcs. seal 14093638 350 2 or 4 87-95 Roller or Flat 1 pcs. seal 14101148 350 4 87-90 1 pcs seal 14102058 305 2 87-91 Roller Cam, 1 pcs seal 14316379 350 78-81 1 & 2 pcs. seals Big Blocks 340220 427 68-76 Truck 361959 454 73-75 Chevelle 361959 454 73-76 Pass 361959 454 75-85 Truck LD 364776 427 68-84 Truck HD 364779 366 68-88 Truck HD 473478 427 68-84 Truck HD 3732811 348 58 Pass 3751872 348 58 Pass 3755011 348 59-61 Pass 3771705 348 59-61 Truck & Replacement 3782870 427 68-76 Truck 3788068 409 62 Pass 3795623 409 61 Pass 3798962 348 62-65 Truck & Replacement Has X on side 3830814 409 63 Pass Has X on side 3844422 409 64 Pass Has X on side 3855961 396 2 65-67 Pass, 325HP 3855961 427 2 or 4 66 Corvette, 390-425 HP 3855961 396 2 or 4 66 Chevelle 325,360,375HP 3855961 396 2 or 4 68-69 Truck LD 3855962 396 2 68-69 Pass, Chevelle 3857655 348 62-65 Truck 3857656 409 65 Pass 3869942 427 66 Pass, Corvette, 390-425HP 3902406 396 2 or 4 67 Chevelle 3902466 396 66-69 Pass, Chevelle, Nova, Chevelle, Camaro 3904351 427 67 Pass, Corvette 385-390-400-430-435HP 3904354 366 66-67 Truck 3916319 366 68-85 Truck HD 1916321 427 2 or 4 67 orvette, Pass 3916323 396 2 or 4 68 Comaro, 325,350,375HP 3916323 396 2 or 4 68 Chevelle, 325,350,375HP 3916323 396 2 or 4 68 Nova, 325,350,375HP 3916323 396 2 68 Pass, 325,350,375HP 3925521 366 68-85 Truck HD 3935439 427 68 Corvette, 430-435HP 3935440 396 68 Pass, Chevelle, Camaro, Nova 3937724 366 68-85 Truck HD 3937726 427 68-84 Truck HD 3955270 427 69 Corvette 390-400-430-435HP 3955270 427 69 Pass, 385-425HP 3955272 396 68-69 Truck LD 3955272 396 69 Pass, Chevelle, Camaro, Nova 3955272 396 70-72 Truck LD 3955274 366 68-85 Truck HD 3955276 427 68-84 Truck HD 3963512 427 68-69 Pass, Chevelle, Camaro, Corvette 385-425HP 3963512 454 70 Pass, Corvette, 360,390HP 3963512 454 70 Chevelle LS6, 450 HP 3963512 454 70-71 Pass, Chevelle, Monte Carlo 3963512 454 71 Corvette 365,425 HP 3963513 454 73-76 Chevelle, Pass 3968854 396 68-69 Truck, Pass, Chevelle, Nova, Camaro 3968854 402 70-72 Truck, Pass, Chevelle, Nova, Camaro 3969851 366 68-85 Truck HD 3969854 402 69-72 Pass, Chevelle, Camaro, Nova, Truck 3969858 427 68-84 Truck HD 3995623 409 61 Pass 3999289 454 72-79 Pass, Corvette, Chevelle, Truck 3999290 396 68-69 Truck LD 3999290 400 70-72 Truck LD, Pass, Chevelle, Nova, Camaro 3999290 402 68 Pass, Chevelle, Camaro, Nova 3999293 366 68-85 Truck HD 3999293 454 73-75 Pass, Chevelle 3999294 427 68-84 Truck HD 6272177 402 70-73 14015445 454 75-87 Truck LD

		Chevrolet Head Casting Number Reference Small Blocks 330545 350, 73, Corvette, 76cc, 2.02-1.6 valves 333881 350, 74-75, 76cc, 2.02-1.6 valves 333882 350-400, 74-80, 76cc, 160/60cc ports 340292 "Turbo" Over Counter Angle Plug, 64cc, 2.02-1.6 valves 354434 262-267-305, 75-79, 163/57cc ports LW casting 358741 305, 76-79 376450 262-305-350, 84-81, 168/60cc ports, 7 bolt ex. 376455 350, 77-85 458642 350-400, 67-70, 462624 350-400, 75-86, 161/62cc ports, 7 bolt ex. 468642 350-400, 76-up, small sparkplugs 471513 267,350, 79 517513 267,350, 79 3030817 400, 74 3636839 265, 55 3703523 265 Corvette, 55 3703524 265,55 3713358 265, 55-56 3713569 265, 55-56 3720991 265, 56-57 3731262 265, 56, 2x4 carb, Corvette 3725306 265, 56-57 3731539 57 Corvette FI 3731544 283, 57-61 3731548 283, 57-62 3731554 283, 57-61 3731556 283, 57 truck 3731762 265, 2x4 carbs, 56 Corvette 3737739 283, 57-62, Corvette, FI 3737775 283, 327, 62-67 3740997 283, 57 3743056 283, 58 3743096 327, 62-67 GMC truck 3747363 283, 57-61 3747460 283, 327, 59-67 3748720 283, 57-58, 3748770 283, 1x4 , 2x4 carbs, FI Vette, X58, stagger VC bolts 3748772 283, 58-61 3755537 283, 57-62 3755539 283, 58-62, stagger VC bolts 3755549 283, 57-62 3755550 283 Corvette, 59, stagger VC bolts 3755585 327 GMC truck, 62-67 3756519 283, 57-62 3760116 283, 60-64 3767460 283,327,60-64 3767462 327, 62-67, 161/65cc ports 3767465 283, 59-61 3767754 283 Power Pack, 59-61 3767792 283, 60-64 3770126 327, 69 3774682 283, 327, 60-64 3774684 327, Pass, Truck, 62-64 3774692 283, 60-61 Corvette 3774692 283, 58-64 Pass, Power Pack 3782461 327, 64-66 Double humpers or Camel hump 161/62cc port 3782461X 60-63, Larger intake runners, 172/64cc port 3782870 327, 62-37 3789817 327, 62-67 3789935 283, 57-62 3790721 283, 64-67 3792563 327, 65-67 3795896 283 Power Pack,63-65 3795896 327, 250HP Corvette, 62-64, 140/60cc ports 3798996 327, 63-67 3814480 283, 327, 60-67 3814482 327, 350, 62-67, 75cc, Lo compression head 3817680 283, 327, 63-67 3817681 327, 350, 62-67 3817682 283, 61-62 3836839 265, 55 3836842 283,327, 57-67 3837064 265, 283, 56-62 3837065 265 truck, 55-56 3837739 283, 57 3848720 283, 57-58 3849852 283, 57-67 3849935 283, 65-67 3852174 327, 62-64 3854520 283, 327, 62-67, 140/60cc ports 3870064 265, 283, 56-62 3870065 265 Truck, 55-56 3876775 283, 327 210 HP Camaro, acc. bolt holes on one end only 3884520 283, 327, 60cc, some made in canada 3890462 302, 327, 350, camel hump, 161-165cc intake port 3901068 350,285HP Crate motor, 64cc, 72�intake bolt angle 3911032 307, 327, 68, W/O acces. bolt holes 3912264 283, 58-62 3912265 283, 63-64 3912311 327, 67 3912313 327, 65-67 3917290 307, 327, 67-68, 142/59cc ports 3917291 302, 327, 350, camel hump, 161/65cc ports 3917292 327-350 Corvette, camel hump, 68 3917293 307, 327, 75cc, 144/58cc ports 3927185 307, 327, 69cc, 69-70 3927186 302-350, camel hump, 63cc chambers, 161/65cc ports 3927187 350, camel hump, 64cc, 69-70 3927188 307, 74cc 3928455 302, 327, 68 3928494 327, 350, 68 3928495 327, 68 3931633 307, 68-72 3931635 250, 68-76 3931637 327, 68-69 3931638 327 truck, 68 3932441 350, 76cc, 161-165cc intake port 3932441X 350, 80cc, 1.94-1.5 valves, 161/65cc port 3932441X 400, 80cc, 1.94-1.6 valves, 161/65cc intake port 3932454 307, 69 3946812 350, 69 3946813 350, 69-70, 138/72cc ports 3747041 302, 350, 64cc 3951598 400, 70, 76cc 3964286 350 3970126 327, 350, 67-70 3973414 350, 70, LT1, 64cc, camel hump 3973487 350, 71-76, 3973487 350, LT1, 75cc, 161-165cc intake port 3973487X 350, 75cc, larger intake port 3973493 400, 71, 76cc 3986316 350 Corvette, 71, 76cc 3986336X 350, 76cc 3986388 307, 350, 68-76 3986339 307, 350, 71, 75cc 3986339X 307, 350, 75cc 3991492 350 LT1, 70, 64cc, straight plug, camel hump 3991492 Over counter, strt or angle plug, 64cc, 157/62cc ports 3998916 350 LT1, 76cc, screw in studs, big valves? 3998920 350, 72-73 3998991 307, 350, 75cc, 72-73, 73 had hard seats 3998993 307, 350, 76cc, 72-73, 15-164/64cc ports, 73 had hard seats 3998993 350 Crate motor, current, Hecho En Mexico, 159/64cc ports 3998997 350, 400, 76cc, 72-73, hard seats in 73 3998997 305, 350, 161-165cc intake port, hard seats 4079261 350, 75. 10033867 Pontiac Alm. Race head, angle plug, 62cc, 196cc intake port, 23�, 2.10-1.625 valve 10045434 Pontiac Alm. Race head, angle plug, 55cc, raised runner, 15� roll over 10051101 Bowtie, Alm, angle plug, 55cc, raised runner, 196cc intake port 10088113 350, 88-up, Corvette, Alm., angle plug, 58cc, .100 raised D-port ex. 1.94-1.5 valve, 19 lbs. 10106178 350, 90, LT5, ZR1, DOHC, 32 Valve, Pass. Side 10106179 350, 90, LT5, ZR1, DOHC, 32 Valve, Driver Side 10110810 350 Gen.I, 93-up 10128374 350 GenII, LT1, 53cc, angle plug, Corvette, Alm., reverse flow cooling, 168-175 cc intake port 10134352 Bowtie, Lo port, alm. 18�, angle plug, 45cc, 223cc intake port 10134363 Bowtie, Hi port, alm, 18�, angle plug, 45cc, 210cc intake port 10134363 Bowtie, Hi port, alm., 18�, angle plug, 60cc, 215cc intake port, 10134363 Bowtie, Hi port, alm., 18�, angle plug, 50cc, 250cc intake port, CNC machined, 2.15-1.625 valves 10134363 Bowtie, Hi port, alm., 18�, angle plug, 65cc, 250cc intake port, CNC machined, 2.15-1.625 valves 10134363 Bowtie, Hi port, alm., 15�, angle plug, 36cc, 223cc intake port 10174389 350, LT5, ZRI, DOHC, 32 Valve, 91-95, Driver side 10174390 350, LT5, ZRI, DOHC, 32 Valve, 91-95, Pass. side 10185040 Symmetrical port, splayed valve, alm, 45cc, 263cc intake port, 1st design 10185040 Symmetrical port, splayed valve, alm, 45cc, 263cc intake port, 2nd. design 10205245 350, Gen.II, LT1, alm., 93, reverse flow cooling, 168-175 intake ports 10207643 350, Gen II, LT1, alm., 94-96, reverse flow cooling 10225121 350, LT1, ZR1, DOHC, 32 Valve, driver side, 94-95 10225122 350, LT1, ZR1, DOHC, 32 Valve, pass. side, 94-95 10239902 350, 96-up, GenII, LT4, alm., reverse flow cooling 10239906 350, Vortec 5700, L-31, 64cc heart shape chmber, 1.94-1.5, 170cc intake port 14010201 305, 84 14011034 Bowtie, Phase 2, iron, angle plug, 64cc, 2.02-1.6, 184cc .080 taller intake port 14011039 350 HP Replacement Alm. 14011049 Bowtie, Phase 6, alm., angle plug, 55cc, 2.02-1.6 or 2.1-1.65, 180cc intake port 14011083 350-300HP, Crate Motor, 64cc, 90� manifold bolt, hard seats 14011083 350, 87-up, 64cc, center bolt VC, 72� manifold bolt 14014415 267, 305, 80-85 14014416 305 HO, 80-85, 58cc, 1.84-1.5, 165/59cc ports, 7 bolt ex. 14022601 267, 305 HO, 80-85, 58cc, 1.84-1.5, 7 bolt ex. 14022801 305, 80-85 14071114 350, 80-85 14079261 350, 86 14096217 350 285HP, Crate motor, 1.94-1.5, 72� intake bolts, 64cc, center bolt VC 14101081 305, 87-88 Camaro, center bolt VC 14101083 350 285HP, or 300HP, Crate Motor, 1.94-1.5, 72� intake bolts 14101128 350, Corvette, 86-87, alm., angle plug, 58cc 14102187 305HO, 87-91, 1.85-1.5, 58cc, 7 bolt ex. 14102191 305, 350, 87 up center bolt VC 14102193 305, 350, 87-up, 7 bolt ex. 24502559 Bowtie, SB2, alm., mirror port, 33417369 350, Gen.I, Crate motor, Hecho En Mexico, 7 bolt ex, 76cc, 1.94-1.5, flange VC holes, heavy castings World Products Cast Iron Heads ( by part numbers ) 4351 67cc, 162cc intake port 4350 76cc, 162cc intake port 4205 58cc, 162cc intake port, 305 torquer 4256 67cc, 172cc intake port, torquer 4257 76cc, 172cc intake port, torquer Trick Flow Twisted Wedge Alm ( by part number ) 31400001 64cc, 2.02-1.6, screw in studs, guide plates,185cc intake ports, candid valve angles 31400002 same 01, except with 72� intake bolts for 87-up 31400003 same 01, except with center valve cover bolt, 86- up 31400005 same 01, except 1.440 valve springs 31400006 same 01, except, with 72� intake bolts, old style valve covers Edelbrock Alm. Heads 6061 Performer RPM Bare head, angle plug, 70cc 6063 Performer RPM Bare head, straight plugs, 70cc 6071 Performer RPM Same as 6061 exc. complete 6073 Performer RPM 70cc, 170cc intake port, straight plug, complete 6075 Performer 65-up, 70cc, 2.02-1.6, screw in studs, guide plates, heat riser 6085 Performer 87-93, center bolt valve cover, 60cc 6087 Performer 87, center bolt valve cover, 60cc, 165cc intake port 7700 Vr. Jr. Race Heads, Bare, 71cc, 212-267cc port, CNC Machined, 2.08-1.6, 7720 Same as 7700 exc complete Big Blocks 058 241/86 cc port 063 256/114 cc port 083 243/110cc port 215 256/114cc port 241 252/116cc port 280 256/114cc port 290 256/114cc port 290 262/115cc port small plug head 291 327/120cc port 340 320/120cc port 820 255/114cc port 840 326/120cc port 842 318/112cc port 990 323/127cc port 330864 396-454 70-81 Oval Port 330865 366-427 70-76 Truck HD Oval Port 336781 454 73-85 Oval Port 343771 366-454 68-85 Truck HD 343772 366-454 76-84 Truck HD Oval Port 346236 454 75-76 Oval Port 353049 400-402 70-76 Oval Port 473328 366 68-85 Truck HD Oval Port 3732791 348 58 3758379 348 59-61 3759256 348 58 3767738 348 59-61 3781147 348 60-61 Hi Perf 3795586 409 61 360HP 3814690 409 62-64 Hi Perf 3819333 348-409 62-65 Truck 3830817 409 63-65 340 HP 3837731 409 63 RPO Z11 3852583 409 65 400 HP 3856206 396 65 Oval Port 3856208 396 65 Corvette 425 HP Sq. Port 3856213 366 66-82 Oval Port 3856260 396 68 3872702 396-427 66 Oval Port 3873858 396, 427 66 Sq. Port 3876875 427 77-85 Truck Oval Port 3904390 396-427 67 Oval Port 3904391 396-427 67 Sq. Port 3904392 427 67 Sq. Port Alm L-88 & L-89 3904393 366 66-68 Truck Oval Port 3909802 396-427 67 Oval Port 3917215 396-427 68 Oval Port 3917219 366-427 68-85 Truck HD Oval Port 3919840 396-427 67-69 Sq. Port 3919842 396-427 68-69 L-88 & L-89 Alm 3931063 396-427 68-72 Oval Port 3933148 366-427 68-84 3933149 427 68-76 Truck 3946074 454 69-71 Alm. L-88, ZL-1, LS-6 3964290 400-454 70 Oval Port 3964291 402-454 70 Sq. Port L-78, LS-6 3965198 396 68-69 Oval Port 3975950 366-427 68-70 Truck Oval Port 3986133 366-427 68-85 Truck Oval Port 3986136 366-427 68-84 Truck Oval Port 3993820 400-454 71-72 Oval Port 3994026 454 71 LS-6 Sq. port 3999241 402-454 72 Oval Port 6272292 402-454 70-75 Oval Port 14092359 427 86-88 Truck Oval Port 14092360 454 85-88 Truck Oval Port

		1958-72 GM The body tag on your car contains vital information for the restorer. The model, body style, paint color, interior color, and date of manufacture are all found on this metal tag. On 1958-67 models, the tag is riveted to the firewall near the windshield (it's vertical). 1968-72 models moved to the cowl panel under the hood near the windshield (it's horizontal). All models used a tag of this sort, and from 1964-72 there are 3 basic tag styles--1964-67, 1968, and 1969-72. We've illustrated all 3 here, and we've listed the important information (and how to read it). If yours is missing, someone removed it! TIME BUILT CODE: The date of manufacture of the car. Consisting of 2 numbers and 1 letter, the code tells you the month and week of the month the car was built. The 2 digits represent the month (01=January, 02=Feburary, etc.) while the letter represents the week of the month (A=1st week, B=2nd week, etc.). It's not possible to pinpoint a specific day of manufacture from the data plate, only the week of the month the car was built can be determined. Generally, most date-coded components on the car were built between 2 and 8 weeks before the build date of the car. There are, however, exceptions to this rule. MODEL YEAR: To the right of the "ST" letters (short for "Style") are the last 2 digits of the model year of the car. "64"=1964, "70"=1970, etc. DIVISION SERIES: The first digit of this code identifies the GM division (1=Chevrolet, 2=Pontiac, 3=Oldsmobile, 4=Buick), the second and third digits identify the series (Chevelle, LeMans, Cutlass, Skylark, etc.). See the V.I.N. decoding information. While the series code on the data plate may not match the series code in the V.I.N., it must be from the same family (the series code will not represent an Impala on a Chevelle data plate, or a Catalina on a LeMans plate, and so on). BODY TYPE: Following the division series is a 2-digit code that identifies the body style (or type) of the car, such as 2-door coupe, 2-door convertible, 4-door sedan, etc. See the V.I.N. decoding section for a list of body type codes. ASSEMBLY PLANT: This code identifies the assembly plant where the body was mated to the chassis/driveline, and final assembly procedures were performed. This is a 1 to 3 character code, and it must match the assembly plant code in the V.I.N. See the V.I.N. decoding section for a list of final assembly plants and their codes. UNIT NUMBER: To the left of the BODY or BDY letters is the unit number assigned at Fisher Body. This number will not match any numbers in the V.I.N. and is not significant to identification or restoration purposes. TRIM NUMBER: To the right of the TR letters (short for TRIM) is the interior code. This 3-digit code shows the color and style of the interior and seats. BODY COLOR: To the left of the PAINT or PNT letters are the exterior color codes. On 1964 Chevrolets, the codes are all 3 digits (including two-tone cars, which have unique 3-digit codes). From 1965 to mid-1969, Chevrolet used 2 letters--the first is for the lower body color and the second is for the roof paint, vinyl top or convertible top color. Buick, Olds and Pontiac used this 2-letter system from 1964 to mid-1969. From mid-1969 to 1972, all divisions used a 2-digit code for the lower color, followed by a 2-digit code for the roof paint, or a letter for the vinyl roof or convertible top color. ACCESSORY CODES: On 1967-and-earlier models only, there may be accessory codes listed on the data plate. These codes indicate certain options on the car. Some of these codes have been decoded on Chevrolet and Pontiac vehicles, while Buick and Olds are still a mystery. The following types of equipment have been listed on data plates that have been decoded: tinted glass, transmission, console, air conditioning, radio, mirrors, rear defroster, seat belts, and bumper guards. These codes will not appear on 1968-and-later plates. SEAT TYPE: There may or may not be an additional code following the trim code that identifies the type of seat installed in the car. These codes break down as follows: A41 = 4-way front power seat (bench) A46 = 4-way front power seat (bucket) A51 = Front Strato bucket seat A75 = H.D. front bench seat A81 = Headrest (Strato seat type) A82 = Headrest (Conventional seat type)