Mornin! All I can say is all the Chevy guys around here love all their stuff. There's lots of Edelbrock suckers in that crowd. One of the guys was recently boasting his engine was 421HP because it had the same cam in it they ised in the Edelbrock dyno test. I looked at him and said "Yeah but that was with their heads" and he says "The heads don't matter, any heads will work". No, I am not joking. I just kinda chuckled. That's their mentality. I just looked at him and said "well it sounds good" and walked off. LOL