So I ran the QF 850 at the track back to back swap out from old Bigs 950, air was terrible & hot humid temps plus track prep sucked. I left the 850 alone out of box other than 4 corner adjustments & setting floats. Carb idled & ran pretty well, I didnt expect anything great ET wise car ran 11.70 @ 114 with QF850 & 11.81 @ 113.5 w/ Bigs 950 but it spun a lil & 60 was off it should have ran a .76 going by my old log of timeslips. I think this new carb is going to work pretty good if I get a chance to change plugs & get to mess around with jets & air bleeds with better conditions.

I feel dumb thinking it had 1.56 venturi's, I was going by old holley dimensions & having a hard time find data on the QF