If you think the eddie held will perform with Brians head the way you pull them out of the box, you're in for a rude awakening...
Compression on aluminum MAY be able to be bumped up, NOT always. There have been test that show there is no true compression advantage with aluminum.
50# isn't gonna do squat on a street driven car.
Unless you port the eddies, they won't run with an RHS head like what Brian does.