Small Block Chevy SBC Block Casting Numbers

Casting Number Years Size Notes
3703524 55 265 Passenger

First 6 mos. used mech. cam not hyd.

3720991 56 – 57 265 Truck/Pass
3731548 57 283 N/A
3556519

3737739

58 – 61 283 2-Bolt mains/Truck/Pass
3849852 58 – 64 283 2-Bolt mains/Truck/Pass
3789935

3864812

62 – 64 283 2-Bolt mains/Truck/Pass
3959512 62 – 63 327 2-Bolt mains
3789817

3794460

62 – 64 327 2-Bolt mains

Truck/Pass

3858174 62 – 67 350, 327 & 302 2-Bolt mains/Truck/Pass
3782870 62 – 67 327 2-Bolt mains/Truck/Pass
3858180 62 – 67 327 2-Bolt mains/Truck/Pass
3791362 65 – 67 327 2-Bolt mains/Chevy II
3892657

3782870

3903352

3789817

64 – 67 350, 327 & 302 2-Bolt mains

Truck/Pass

3849852

3849935

3896944

393288

65 – 67 283 Truck/Pass
389257 67 – 69 302 2-Bolt mains

67 Small Journal (327 block)

68-69 Large Journal (350 block)

3914653

3914636

3932373

3970020

68 – 73 307 Truck/Pass
3956632 69 307 2-bolt mains
3914660 68 327 2-bolt mains
3790041

3814660

3955618

68 – 69 327 2-Bolt mains

Corvette/Camaro/Hi PO

3914678 68 – 79 350, 327 &: 302 2-Bolt mains
3855961

3958618

3970014

6259425

68 – 76 350 2-bolt mains

Pass.

3970014 68 – 79 350 2&4-Bolt main
3956618

3932386

68 – 79 350 & 302 4 bolt mains

Truck/Hi Perf

3970010 68 – 79 350 & 327 2&4-Bolt mains/Truck/Hi Perf
3932388 69 350 4-bolt mains
3951511 70 – 73 400 4 Bolt mains/HD Truck/Pass
330817 70 – 80 400 2-Bolt mains
360851 74 – 76 262 Monza
3951509

3030817++

74 – 76 400 2 Bolt Mains

High Nickel Block

460776

460777

460778

361979

78 – 79 305 Lt. Truck/Pass
14016379 78 – 79 350 Lt.Truck/Pass
366245* 78 – 79 350 4-Bolt mains

Bowtie High Tin

Dipstick in Pan

1401280

14016376

471511

79 – 82 267 Passenger
14010201

14016381

14010202

14010203

80 – 84 305 Lt. Truck/Pass
1401029

14010207

14010209

80 – 85 350 2&4-Bolt mains

Passenger cars

14011064* 82 – 86 350 4-Bolt mains/Bowtie High Tin
14088548

14093638

14316379

86 – 88 350 2&4-Bolt mains

1 piece rear main seal.

Small Block Chevy Engine 265 283 327 350

1 Comment »

  1. tom hewett said,
    May 14, 2011 @ 1:11 am

    i have a 350 block number is 10243887 can you tell me what this is?thanks tommy

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