950 Ultra XP tuning on 500"

To YR and Rusy.
Mines a 10.5:1 440 with roller cam, pro systems recommended a 1100 dominator, which is what I ended up getting, seems like those big ol motors like big carbs. As to the drivability, it is a 3 circuit which I’ve read a lot of people don’t like for street use, but idles clean, cruise is real crisp, and instant when you drop the hammer!