msminnesota

I just bought my first corvette. 1968 that needs some tender loving care. I have began to pull it apart and am planning to do a complete restoration. I have the engine out and am confused on the head casting numbers. The block is #185S401198 V0926HT which I believe is a 327/350HP. The heads are #3917291. Research says that these for the 300HP instead of being #3917292. All other numbers seem correct on everything else. The heads also have a H227 stamped by the casting numbers and a GM17 and GM18 casting number. Can someone tell me if these look correct and what I actually have?

LT-1 kid

the head casting #s would be the same but the 350hp heads had bigger valves. date = aug 22 1967, block should be 4 bolt with upgraded hardware, rods,crank,pistons, 8" balancer, deep grove pullys. good luck with your project.

restoman1

3917291 heads came with either 1.94 intake / 1.50 exhaust valves (327/300) or 2.02 intake / 1.60 exhaust valves (327/350) so they're probably the original heads for your engine. The only real way to tell is to pull them and measure the valves.

No 327 came in a 4 bolt main configuration, so you should have 2 bolt mains. (4 bolt mains for the small block didn't start until 1969 and then only on the 302 and 350 high hp engines.)

Ed

msminnesota

It is a 2 bolt main. I will measure them tomorrow. Am I correct that the HT stamp should be 350HP?

Mike Ward

Yes. Does your pad really say 185S401198?

msminnesota

It looks like it starts with a 1 but must be 7 as it would them match the VIN and the fact that it is a convertible. Is that your concern?

Easy Mike

My guess is No. I got a dollar which says 18S4001198. October 67 car.

MsMinnesota: there should be no 5 in your VIN derivitive.

msminnesota

You are correct. I think I must have fat fingered it. thanks.

Easy Mike

Bingo.

restoman1

I'll take that bet Mike. (You have one too many zeros after the 18S4!)

:-)

Ed

Mike Ward

Easy Mike

Zeroes don't count. (I didn't catch it.) Do you take PayPal?

MsMinnestoa: your car does not exist.

restoman1

as Homer would say...