Question - which casting number would be best for a mild SBC buildup? Why?
I've heard the 062 flows just a tiny bit better than the 906, but the 906 has inconnel seats in them which I'm thinking might be better for a marine engine use...
- the rest of the combo is a basic 355 with flat-tops (4 valve reliefs, -7cc), I'm re-using the XM262H cam/lifters, and was thinking of replacing the 'centerbolt' or "tbi" heads with some vortec castings and matching RPM Air-Gap intake.
Also - how much HP do you guys think they're worth over the older (whatever is stock on a '95 5.7L non-magnum engine) with this setup? (Is it really worth the hassle of getting a set rebuilt and swapping intakes?)