Originally Posted by rabbit
I am gonna rejet it tommorrow and give that a try. It still has everything exactly like it was before with the exception of the heads and cam. So I am also guessing the jets as well. Also has never had air cleaners because it has velocity stacks on it.
For giggles, before you change anything else...
I'd take a piece of cardboard, make a 1/2 circle out of it, and duct tape it to the front of the first velocity stack.
If you went to a wilder cam, you'll have less part throttle vacuum.
Less part throttle vacuum means that it's more prone to turbulent air going over the bleeds and disrupting the bleed air balance.
It could be something as simple as needing to change from the stacks over to air cleaners... or it could be the jets. But making a deflector for the stacks out of cardboard is a heck of a lot easier than changing jets, just as a test.