Which head gaskets do I use?
November 24th, 2013, 07:20 PM
#1
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Thread Starter
Join Date: Jul 2013
Posts: 81
Which head gaskets do I use?
I have a 1970 Olds 350 with #6 heads. I'm having it bored 0.030" over. I understand the stock bore size is 4.057" and I read that the gasket-bore size should be 0.050" larger than the engine bore. If I do the math, that means a bore size of 4.137"? I'm using Speed Pro/TRW Forged 6cc Dish Top Pistons #2321F30. I also read that Cometic MLS head gaskets were highly recommended with a thickness of 0.027"? I'm just having trouble figuring out which head gaskets to order. Will these work? http://www.summitracing.com/parts/cg...ake/oldsmobile
Last edited by HitTheHole; November 24th, 2013 at 07:22 PM. Reason: Add more info
November 25th, 2013, 09:29 AM
#3
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 48,269
The bottom line is that head gasket selection is a function of your intended use of the motor and your selection of all the parts. The FelPro gasket works great but has an 0.040" compressed height. The result is a slightly lower CR. The Cometics are a fantastic product but more expensive. Your call if you need the slight increase in CR or not.
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