I've asked for that before when He made this assertion, & more specifically, if anyone else had this result/opinion. Crickets. I'm not saying it's incorrect, as many are surprised by some single-plane V-8 intake low-end torque/high-end superiority over plain-jane DP intakes. But if I make a 1st hand knowledge statement, I'll give numbers and details to back it up,........
I'm not saying he's wrong, either. Clearly, the Clifford is different from the traditional long runners the stock manifold has. All I know is, my slant 6 runs great with the Offy, that's what I HAVE so that's what I'm using. lol
