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1969chevss · 06-12-2015, 03:38 PM

working on a 69 chevelle 300 deluxe factory 307 powerglide would like to keep my compression ratio up there that's why im looking for the smaller bore .015 steel shim. keeping my options open at this point

06-12-2015, 03:38 PM	#3
1969chevss Junior Member Join Date: Jun 2015 Location: Iowa Posts: 13 Likes: 0 Liked 0 Times in 0 Posts	Re: small bore sbc head gaskets working on a 69 chevelle 300 deluxe factory 307 powerglide would like to keep my compression ratio up there that's why im looking for the smaller bore .015 steel shim. keeping my options open at this point