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How about using the diamante heads with the original cams? I think the diff in the diamante is the pistons, not the combustion chamber size. I also advise against the shims. You lose the squish area in the chamber which promotes detonation.

Ok , I think I understand,,,a friend explained how the cam is not changing the compression , it is a domed interference piston in the diamante. So what your saying is what I'll do if another Diamante engine shows up around here, and I won't use the block. Still planning a trip up north soon to Grasscat", just hoping for heads to turn up somewhere.

dave h.
'89 Raider V6 5spd;Aisin Hubs;; Gen2 LS: frt. brakes, rear coils;U.C.arms;R.trailing arms;idler arm; rear LSD axle w.disc brakes ;2 battery system for Dog's fan; relocated ECU; custom bumpers;J.Baker receiver;Conferr roofrack; t-bar crank.