You can run anything from a 950 4150 to a 1050 4500 8896 Dominator.

Here is what you have to ask yourself. Do you have enough convertor, gear, and cam, to launch hard with the big carb, then the answer is the 1050 Dominator...

Now if you a lighter stall, a little less cam, and a little less gear, I would put a 950-1050 4150 carb on it.

If you have a tight stall big cam, I would put an annular 950-1050 4150 carb on it.

For the record, we run a 512RB big port EZ-1 head with a 950 4150 carb, 4800 stall, 4.56 gear, and it has been awesome. Would we go faster with a 4500 carb, yes, but how much faster, .1? maybe. And we would have to add a big spacer, or get a new intake.