Shoot, had I known this adapter was available 10 years ago, I might have bought it instead of finding a different cast iron manifold to replace that turd with. Had I know the earlier 460s had quadrajets on them, I woulda found one of them manifolds instead, and tapped my buddies tuned and tweaked jobs he had for his chebbies.

I would only go with the Edelbrock Performer if I needed EGR provisions, (essentially its a stock manifold, only aluminum) otherwise I would use a better manifold like the RPM, or the Weiand Stealth.