I have built cars with both. Both '68 Camaros, both stick, 5sp vs. 6sp, Weiand 383, Procharged 355. The Weiand car has way more down low, and is a way easier install, just bolt on, get a blower carb and go! The Procharger needs way more fab work, more fuel system, trouble with belts, etc. That said, the Procharged car is WAY faster. It just cost more.