moron needs gm steel gasket #ends in 633 - Page 2

ss wannabee · 02-25-2010, 09:53 AM

I was wondering if the racers in the "small-bore" community had used anything other than the GM #633, and the Cometic? I guess you could use the GM #711...but I think it's a bit thicker, and I don't think it fits the smaller engines as good as the 633...Not sure if you can get the 711 anymore? We're talking for early engines...the 265-283, and the 307. Maybe you could use a 305 head gasket? I think GM used steel shim on the very early 305's...and switched to composition? Any 305 "experts" know what those measure in thickness?

55 Chevy · 02-25-2010, 10:13 PM

I have used the 262/305 head gasket many times with my combination. It was old G.M. part # 14085906 & older part # 362690 and was also made by McCord. They were .016 thick & cross to currently still available # 10105115. The first two are steel shim while the third one has a coating on it & measures .025 thick so not a straight cross. As far as size I believe they are 3.910 compressed diameter but I will measure an old one and post that number later.

Allan

Jack McCarthy · 02-25-2010, 10:39 PM

ok guys, thanks again to the forum for saving my butt... i now have enough head gaskets to insure i can race until my motor is worn out (like me)

thanks again to ray grice and bob wibright, old friends have old parts !

captain jack

02-25-2010, 09:53 AM	#11
ss wannabee Senior Member Join Date: Jun 2005 Posts: 663 Likes: 0 Liked 5 Times in 5 Posts	Re: moron needs gm steel gasket #ends in 633 I was wondering if the racers in the "small-bore" community had used anything other than the GM #633, and the Cometic? I guess you could use the GM #711...but I think it's a bit thicker, and I don't think it fits the smaller engines as good as the 633...Not sure if you can get the 711 anymore? We're talking for early engines...the 265-283, and the 307. Maybe you could use a 305 head gasket? I think GM used steel shim on the very early 305's...and switched to composition? Any 305 "experts" know what those measure in thickness?

02-25-2010, 10:13 PM	#12
55 Chevy Member Join Date: Feb 2008 Location: Calgary,Alberta area Posts: 221 Likes: 15 Liked 12 Times in 11 Posts	Re: moron needs gm steel gasket #ends in 633 I have used the 262/305 head gasket many times with my combination. It was old G.M. part # 14085906 & older part # 362690 and was also made by McCord. They were .016 thick & cross to currently still available # 10105115. The first two are steel shim while the third one has a coating on it & measures .025 thick so not a straight cross. As far as size I believe they are 3.910 compressed diameter but I will measure an old one and post that number later. Allan Last edited by 55 Chevy; 02-25-2010 at 10:14 PM. Reason: grammar error

02-25-2010, 10:39 PM	#13
Jack McCarthy VIP Member Join Date: Feb 2002 Location: lyndon ky. ... louisville area Posts: 1,284 Likes: 22 Liked 352 Times in 92 Posts	Re: moron needs gm steel gasket #ends in 633 ok guys, thanks again to the forum for saving my butt... i now have enough head gaskets to insure i can race until my motor is worn out (like me) thanks again to ray grice and bob wibright, old friends have old parts ! captain jack __________________ Jack McCarthy 3609 STK "the Captain"