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Home 49-54 Data General Chevy Data

Chevy Block Casting Number

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Chevy Block Casting Number
Big Blocks
348-409
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There is a lot of misinformation on the internet about these numbers. We have taken the time to verify the data as much as possible. There still may be errors. Please lets us know if you find one.

Chevy Small and Big Block Casting Numbers and Data

Small Blocks

Number C.I.D. M-Blts Year HP Description
140029 350 2 80-84
330817 400 2 72-80 150-180 3 freeze plugs
355909 262 2 75 Nova, Monza
355909 305 2 76-79
360851 262 2 75-76 Monza V-8
361979 305 2 or 4 77-79 Some Canadian HD blocks have 4 bolt mains.
366245 350 4 78-79 Dipstick in oil pan, Bowtie High Tin
366286 4 Bowtie, Alu., Siamesed, Str. Nod. Iron Caps, 2 pc. seal, 4.00-4.150 Bores, 2.45 Mains
366287 4 Bowtie, Alu., Siamesed, Str. Nod. Iron Caps, 2 pc. seal, 4.00-4.150 Bores, 2.45 Mains
366298 4 Bowtie, Alu., Billet Caps, 2 pc. seal, 3.398 Bore with sleeves
366299 4 Bowtie, Alm, 4.00 Bore, Nod. Iron Splayed Caps, Wet Sump
376450 350 4 78 175-220
389257 302 2 67
393288 283 2 65-67
460703 350 4 78 175-220
460776 305 2 78-79
460777 305 2 78-79
460778 305 2 or 4 78-79 Some Canadian HD blocks have 4 bolt mains.
471511 267 2 79-82
3556519 283 2 58-61
3703524 265 2 55 195 No Oil Filter, Vett
3720991 265 2 56-57 210-240 Vett
3731548 265 2 57 No Side Motor Mounts
3731548 283 2 57 220-283 No Side Motor Mounts, Vett
3737739 283 2 58-64 170-290 220-290 HP Vett
3756519 283 2 58-62 170-315 Passenger, Vett
3782870 327 2 62-67 250-375 Passenger, Chevelle, Vett
3789817 283 2 62-64
3789817 327 2 62-67 Truck
3789935 283 2 61-64 170-315 Passenger, Vett
3790721 283 2 62-64 170-220 Chevy II, Recess Oil Filter Boss
3790721 327 2 65-66 250-350 Chevy II, Recess Oil Filter Boss
3791362 327 2 62-67 250-350 Chevy II, Recess Oil Filter Boss
3792563 327 2 65
3792582 283 2 64-65
3794226 283 2 58-63 170-195 Passenger
3794460 327 2 62-64
3814660 327 2 68-69
3830944 327 2 63 300
3834810 283 2 64-66 195-200 Passenger, Chevelle, Truck
3834812 283 2 62-63 170-195 Passenger, Commercial Truck
3837739 283 2 58-62
3849852 283 2 57-66 Truck, Passenger, Chevelle
3849935 283 2 65-67
3852174 327 2 62-64
3858174 327 2 64-67 275-350 Passenger, Chevelle, Vett, Trucks
3858180 327 2 64-67 250-375 Passenger, Chevelle, Vett
3858618 350 2 68-76
3862194 283 2 65-67 195-220 Chevy II Recess Oil Filter Boss
3862812 283 2 62-64
3892657 302 2 67 290 Z-28 Camaro
3892657 327 2 67 210-350 Passenger, Chevelle, Vett, Camaro
3892657 350 2 67 295 Camaro
3896944 283 2 66-67 195 Passenger, Chevelle
3896948 283 2 66-67
3903352 327 2 67 210-350 Passenger, Chevelle, Vett, Camaro
3914636 307 2 68 200 Truck, Passenger, Chevelle, Chevy II
3914638 307 2 68
3914653 307 2 68-73
3914660 327 2 68 210-300 Passenger, Chevelle, Chevy II, Camaro, Vett
3914678 302 2 68 290 Z-28 Camaro
3914678 327 2 68 210-350 Passenger, Chevelle, Chevy II, Camaro, Vett
3914678 350 2 68 295 Chevy II, Camaro
3931174 307 2 68 200 Truck
3932338 283 2 62-67
3932371 307 2 69-73
3932373 307 2 68-73
3932386 302 4 69 290 Z-28 Camaro
3932386 327 2 69
3932386 350 2 or 4 69 300-350 Passenger, Chevelle, Chevy II, Camaro, Vett
3932388 350 2 or 4 69
3932388 327 2 69 290
3933180 327 2 68-69
3951509 400 4 70-71 150-265
3951509 400 2 74-80
3951511 400 2 or 4 70-73 255-265
3956618 302 4 69 290 Z-28 Camaro
3956618 327 2 68-69 235 Passenger
3956618 350 2 or 4 69 250-350 Passenger, Chevelle, Chevy II, Vett, Camaro
3956632 307 2 69 200 Truck, Chevelle, Chevy II, Camaro
3959512 327 2 62-67
3959532 283 2 64
3959538 327 2 Chevy II, Recessed Oil Filter Boss
3970010 302 4 69 290 Z-28 Camaro
3970010 327 2 69 Truck
3970010 350 2 or 4 69-80 Truck
3970014 350 2 or 4 70-76 200-255
3970020 307 2 69-73
3970024 307 2 69-73
3970041 327 2 65-67
4715511 305 2 80
6259425 350 2 69-76
10036033 350 4 Crate Motor, 2 pc.seal, Hecho En Mexico
10046164 305 2 86
10049804 4 Alum. Pontiac Super Duty version of Gen.1, 4.00" Bore
10051182 2 or 4 Bowtie, Non-siamesed, 3.75-4.30 Bores, 1 or 2 pc. seals
10051184 350 4 86+ Bowtie, Siamesed, 4.00-4.160 Bore
10054727 350 2 or 4 86+ Made in Canada, 1 pc. seal
10066036 350 2 or 4 86+ Crate Motor, 2 pc. seal, Hecho En Mexico
10066038 350 4 92 Crate Motor, 2 pc. seal, Hecho En Mexico
10090511 350 2 90 375 LT-5, ZR1 Vett
10125327 350 2 or 4 92-96 300+ Gen. II, LT1, Reverse Flow Cooling
10125327 350 2 or 4 96+ 300+ Gen. II, LT4, Reverse Flow Cooling
10134398 4 Bowtie, Alm., 4.125 Bore, 2.65 Mains
10134996 4 Bowtie, Alm., 4.125 Bore, 2.65 Mains
10153558 350 4 91-92 375 LT5, ZR1 Vett
10168588 265 2 94-96 L99, Gen II, 4.3 V-8, Caprice, Reverse Flow
10199001 350 4 93-95 405 LT5, ZR1 Vett
10243878 305 2 96-98 Vortec Truck, Roller Cam, 1 pc. seal
10243880 350 2 or 4 95-00 Gen I Crate Motor ZZ4, Roller Cam, 1 pc. seal
12550592 350 97-99 345 Crossbolted Block, Gen III, LS1, Alum.
12551358 99+ Gen.III, 4.8L or 5.3L, Truck, Iron
12551364 364 98-04 Crossbolted Block, Gen III, 6.0L, Truck, Iron
12559378 350 98-00 345 Crossbolted Block, Gen III, LS1, Alum.
12559846 350 98-99 345 Crossbolted Block, Gen III, LS1, Alum.
12560621 350 98+ 345 Crossbolted Block, Gen III, LS1, Alum.
12560626 350 98-00 345 Crossbolted Block, Gen III, LS1, Alum.
12560629 350 99 Crossbolted Block, Gen III, LS1, Alum.
12561168 350 01-04 350-405 Crossbolted Block, Gen III, LS1, Alum.
12562174 350 98+ 345 Crossbolted Block, Gen III, LS1, Alum.
12566910 325 04+ Crossbolted Block, Gen.III, SSR Truck, 5.3L, Alum.
12568952 364 05+ 400 Crossbolted Block, Gen.III, LS2, 6.0L, Alum.
12571048 325 04+ 400 Crossbolted Block, Gen.III, 5.3L
12573581 364 98-04 Crossbolted Block, Gen.III, Truck, 6.0L, Iron
12577184 364 98-04 Crossbolted Block, Gen.III, Truck, 6.0L, Iron
12577396 02+ Gen.III, Truck, 4.8L or 5.3L, Iron
14010201 305 2 80-85
14010202 305 2 80-85
14010203 305 2 80-85
14010207 350 2 or 4 80-85 190+ Vett
14010209 350 2 or 4 80-85
14010280 267 2 79-82
14011064 350 4 83 High Tin
14011148 350 87-89 Roller Cam, 1 pc. seal
14016376 267 2 79-82
14016379 350 2 or 4 77-79 225 max.
14016381 305 2 80-84
14016382 305 2 79-84
14016383 305 2 80-85 Truck
14079287 350 86-90 Truck
14088526 350 87-89 Roller Cam, 1 pc. seal
14088548 350 2 or 4 86-88 205+ Flat Tappet, 1 pc. seal
14088551 305 2 86-87 Flat Tappet, 1 pc. seal
14093627 305 2 87-94 Roller or Flat Cam, 1 pc. seal
14093638 350 2 or 4 87-95 Roller or Flat, 1 pc. seal
14094766 305 2 86+ 1 pc. seal
14101147 305 2 85+
14101148 350 2 or 4 86-90 205 1 pc. seal, Roller Cam, Non-LT1
14102058 305 2 87-91 Roller Cam, 1 pc. seal
14316379 350 78-81 1 and 2 pc. seals
22551656 4 Rocket Block, 4.00-4.190 Bores, 2.45 Mains, Splayed Caps, Dry Sump, 2 pc. seal, 9,025" Deck
22551660 4 Rocket Block, 4.00-4.190 Bores, 400 Mains, 9.30" Deck, 2 pc. seal


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