new GM Crate.
Next week-end I guess I will pull some plugs for a looksee and inspect the inside of the manifold.
Only 2500 miles on this thing----been happening from day one
Elelbrock 1411 carb--------6lb pressure
And come to think of it-------idle mixture screws don't do too much untill screwed all the way in.--------tail pipes are black too.
There is like ZERO hesitation when I romp on it.