you already said that you lowered it to 5 #, I said 3#

The Dominator and the 4150/60 style carbs have different base patterns--did you change maniolds with the carb or use an adapter plate?

Did you change the jets like I suggested?

Out off several steps I suggested, you have only replied about one and you didn't go to my number(fuel pressure) The larger needle/seat sizes in performance carbs are easily over ridden with pressure so for trouble shooting you need to eliminate that possiblity

I saw that you have headers on the car---are they hooked into a system or are they just headers dumping at the collector?