Exactly,, I don't wanna play that game.
all I'll say is I made just a titch under 800 at the flywheel n/a single carburated small block on a SuperFlo engine dyno, with a cam that has just a little more than the 0.050" duration of the Edelbrock 2201,,
Edelbrock: 234/238 @ 0.050",,
the cam in my Nova : 250ish/ 260ish at 0.050"
well except mines .81 lift with a custom set of Jessel 1.7 / 1.8:1 shaft rockers for the Allpro 245 Rased runner heads,,, flowing 370ish
Your cam, my heads and I'm sure you can make your 500 RWHP
as a FYI heads and valve train ran me just over $9k
That's what were getting at C20
If the cam is "just fine" whatever HP number you end up with will have to be 'just fine' also.
Building a combination around an existing component (unless it's the heads) is quite counter productive to the budget. But so be it.
Choose a fuel spec, and choose a budget and then we could offer some realistic help on your combination