Niko Krzynowek

im currently in the process of building a 383 stroker motor for my 70 camaro. i bought a egale 400 crank and speed pro hypertension pistons h860cp030. rods egale i beam sir5700bplw. heads tfs-30410003 trickflow heads 64cc. cam cl12-250-3 xenergy. i was just wondering if someone could help me out on what compression this should be around and what i should potentially have for hp. another question i have, will the headers i have for my stock 350 work with these heads even tho they are angled plugs? and what kind of plugs should i use with these heads i was told by a friend i don't want regular plugs there's a smaller plug to use