Valve to piston clearance?

You are going thru some of the same thought processes as me. I am planning and getting parts for a street 390 build. Trying not to buy the wrong stuff, etc.

Don’t overthink this part. If you make sure you have the right compression height pistons and you get a reputable cam. You are 99% of the way there. You need to mock it up once you have everything but chances are that you will have more space than you want and you will need to take off some from the deck. Especially with if you are going to use a mopar head. Those are just my thoughts, I am a rookie.