Compression Ratio

Your hands are fairly tied when it comes to cr there's some that know how to push the limits.

For the rest of us Look at what the average guy can run iron heads and agressive cam 9.5-10:1 with aluminum heads 10.5:1 but since we're talking milder cams were talking 8.8-9.5:1, like I said before is adding .5 cr gonna make that much of a difference to risk a pinging mess of an engine. So if on the mild hassle free side probably want 9:1 at best.