We tried 3 carbs on my old 416, 850 demon, 850 annular and a 950 HP. On the dyno there wasnt one HP differance between them. After it was in the car i tried a Dom, It slowed it down, alot. Jetted up and down with not much improvment. The 950 had better throttle responce with the smaller primaries but didnt make the power the BG 850 did......Phill