moron needs gm steel gasket #ends in 633

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?

02-25-2010, 09:53 AM	#11
ss wannabee Senior Member Join Date: Jun 2005 Posts: 663 Likes: 0 Liked 7 Times in 7 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?