Maximizing flow limited combos?

Hey fellas. This is a different spin on a common theme here, relating to power potential vs. flow capabilities of the cyl head.

My particular challenge, at present is I have an OOTB set of aftermarket heads that are flow limited. These are slated for attachment to a 4" stroker combo. (In my case it's a 340 based, not that it matters much). Combo has flat top pistons with valve reliefs and will be around 11.5:1 compression with my gaskets and deck. I have hedman hussler 1-7/8 headers, and (right now) an M1 single plane. I do plan on a head upgrade at some point but it's not in the cards now.

So I totally understand that this combo is very flow limited and from what I've seen pretty much everywhere it'll do good to make in the range of somewhere between 450-500 crank HP, and will probably top out sub 6000 rpm.

My question is, what "tricks" can someone employ to get the most out of a combo like this? For example, I could consider valve job, valve sizing, cam, rocker arm, intake, carburetor, ignition, some exhaust changes etc. It would be nice if said parts would also play well in the future with an upgraded set of heads but not absolutely necessary.

What would you guys do to max out a set of heads? What would a "stock port" class engine do?