Mild 383 build

Shorty Thompson said
Guidance is what I'm looking for. I have closed chambered heads. Somehow, I just don't see them being the right way to go. You tell me.

Heads is where the powers at everything else decides how much of that power your gonna get.
Probably best is a set of cheap aftermarket heads, better than sinking money into stock.
I don't know all the options other than the stealth's.