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#2 |
Senior Member
![]() Join Date: Jul 2004
Location: Estherville, Iowa
Posts: 3,371
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Re: .028 GMPP head gasket question
Many 305's had the .028 gaskets factory, make sure to get the ones for the 305 bore, not a 350. Ideal piston to head clearance is about .040, the .028 gaskets should give about .53, unless you can find steel shim head gasket for the 305 bore, I can't find them anywhere. Most rebuilder gaskets run about .040, but I had some Victor a while back that were .050, did not use those. You would have to CC those 601's to know for sure, since the larger valves should have had the chambers enlarged for clearance.
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1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0 |
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