V8 Manifold Comparo!

[327power]

I like the look and durability of the old 2.5 outlet ram horn manifolds. Speedway Motors has their own ram horn manifold that looks a little weird, but also appears to outperform the stock GM ram horns. Which one would be best for a truck? In theory, either one will have 2.5" pipes all the way back. ...and, would a ram horn manifold even fit on a 73'-87' model Chevrolet? Clear the crossmember? Thanks!