360 Magnum Heads

Mild 360 magnum build, toying with getting the Edelbrock performer aluminum heads but that is a massive chunk of change to drop.

Done alot of research but what i've never been able to find was an apples to apples comparison video where a motor Dynod (X) Horsepower with the stock heads and then Dynod (X) horsepower by swapping to the eddys with NO other modifications so that I have a base line of just what that 2000$ check is getting me flow/HP wise and whether or not id be better off just having a shop port and polish my stock heads for less money. Has anyone here done such a test and confirm or deny that you will actually make noticeably better power with the Eddys over stocks?

Ill be running dougs long tube headers, dual exhaust, probably magnaflow or borlas or something of the like, Eddy air gap carb intake, prolly a holley 650-750 MSD iginition, and a mild cam. Horsepower goal is somewhere around 400-450, but if thats not achieveable without tearing into the bottom end and messing with pistons im ok with less.
Your goals can be reached using the stock magnum heads. If they are not cracked, best bang for the buck may be just running them.