SBC casting numbers/suffix code help

[12secondSY]

Im finding conflicting information on the engine in my 87 blazer. The casting number Ive found says it can be a 350, 302, or 383. The suffix code apparently doesnt exist but I can see it clear as day so I know I read it right. If anyone knows a good place to check this or knows what this was out of please let me know. Heres the codes

From the back of the block
3970010

From in front of the passenger cylinder head
V0314CLY

From the cylinder head
333882


Looks like the head is a 350/400 year 70-80 valves 1.94/1.50 chamber 76cc

 

[sytyguy]

Re: SBC casting numbers/suffix code help

Block info - http://www.hotrodders.com/forum/3970010-a-58601.html
Head info - http://www.hotrodders.com/forum/chevy-head-casting-number-333882-good-not-100256.html

 

[dgoodhue]

Re: SBC casting numbers/suffix code help

882's suck. Those are smog heads. When I had my Corvette and was into SBC, it was common recommend that it wasn't worth your time porting those heads. I think lingenfelter modifying SBC book even mentions this. I not 100% but its like using the stock syty heads, but SBC have many heads option both from the factory and aftermarket.

 

[12secondSY]

Re: SBC casting numbers/suffix code help

I was just reading at sytyguy's link and they do suck

 

[wildphil]

Re: SBC casting numbers/suffix code help

The 3970010 block if it is a four bolt main block a desireable block. Most are four bolt main blocks but a few are two bolt. If you want iron heads you can get a set of Dart heads for not much more money than it cost to rebuild a old set of heads and they flow better than any of the old factory performance heads.

 

[12secondSY]

Re: SBC casting numbers/suffix code help

I might check into getting a set of iron heads. If Im lucky I'll know someone with a used set that already have valves and such.

 

[midnightbluS10]

Re: SBC casting numbers/suffix code help

try http://www.mortec.com/castnum.htm

 

[sytyguy]

Re: SBC casting numbers/suffix code help

try http://www.mortec.com/castnum.htm

Was gonna post that, but their site was down earlier.

 

[AceHaag]

Re: SBC casting numbers/suffix code help

http://www.73-87.com/chevy_ids/sbcid2.htm <--- try that
CLY didn't seem to be a good code it wasn't on the list but the date code to the right of the block casting numbers would also help identify it better

 

[12secondSY]

Re: SBC casting numbers/suffix code help

http://www.73-87.com/chevy_ids/sbcid2.htm <--- try that
CLY didn't seem to be a good code it wasn't on the list but the date code to the right of the block casting numbers would also help identify it better

Its not on any list but I can see it perfectly. I even checked it 3 or 4 times. Unless that C is an O or something but it didnt look like it. Maybe this is a special one off block thats worth millions :lol: