SBE 318 basic rebuild +CAM , INTAKE, HEADS, expectations?

That is overcame for you.. broooo.. that's less than a thumper lol..
Go for it. Then there's the stout valve spring requirements. Then there's the correct retainers and valve locks. Then there's the machining on the cylinder heads for the springs and the positive seals you have to run and cutting the guides down so the retainers won't hit the guides. Yeah. Run that one.