80’s 318 compression ratio figuring out where I’m at.

I looked at the heads again and the edge of the intake valve is fairly close to the deck (bottom of the head). With a straight edge I got maybe 0.035 clearance. So if I milled an additional 0.030 from the heads there may not be enough piston to valve clearance with flat top pistons with no valve reliefs which is one option I was investigating. Especially if my cam has Approx .470 lift. I may have to go with the kbs which have large valve reliefs and wouldn’t require further head milling. I may have to steal some of my daughters play dough and see what my current piston to valve clearance is.