Re: 69 Z28 head gasket
Thanks for all the response & info. ,
The machine shop set piston wall clearance at .004 ,
I ordered Cometic 4.060 bore, .027 compressed thickness, this will give .034 to .035 quench area, the #140 cam has a lot of overlap & duration to bleed off a little compression, the tight quench helps prevent detonation, I have built several 302 engines over many years using these tolerances and had very good performance and all were very reliable,
Last edited by miket1; Jun 2nd, 15 at 09:09 PM.