408 cam / build help.

If I were to throw on some eddlebrock rpm heads with that 525 lift cam (or another decent cam) with true 1.5 ratio rocker arms what is the likelihood that I will push past the 500hp number assuming a 10~ ish to one static comp ratio
I agree with flyfish. The OOTB ports on the edelbrock head will routinely support 400 - 450 hp when built and calmed for such.

Here are two threads to compare power, parts needed and then you can read into there pricing.

Here is a mild cammed build with edelbrock heads. Just proving you don’t need a ton of cam to make a good street powered mill.
The everyman's 360 LA Eddy headed engine dyno tested

Here is another thread by the same author with ported Edelbrock heads on a 371. (.070-360)
371 build W/Big Mouth heads