timing the same for headers set up? lack power?

I wouldn't wait, I get the 350 2brl or 390 4brl now.

How big a jet you need 'could' exceed the bleed / eco valve and really not have you in much better shape, and besides...you don't need big valves to realize the benefits of the bigger carb and that 1920 was good...but back in the hayday not 'today'.jmo

btw love the name 'mopar king'.... with the title 'beginner/novice' under it.lol