It runs well, I didn't need to do anything at all the the carb. I'm running 1.5" straight pipes to the back of the truck.
I just swapped out the old single flapper exhaust with the Fentons. Excessive heat has not been a problem and I've run it in 100 degree weather with traffic.
If you have a set of the old Fentons with the heat manifold cast into them you've found yourself a gem. They are very hard to find...and when you do find a set in decent condition, people want an arm and a leg for them.
