A 2-circuit Dominator built by me would of topped em all GUARANTEED as it has even on small blocks to the tune of 5-6 mph and .05+ in et reduction.........simple physics and a stout motor need lots of air n fuel and the fuel curve would make ya smile. Here's a "cool" deal I found the other day testing an 850 on my Dart. I had to put a 4150-Dommy adapter on my adapter upside down to test it and after getting heat in the motor and some foot brake climbs, I removed it and it was iced up on the base plate.......try that w/EFI.............NOT GONNA HAPPEN..........I will send Brad a 1050 to try someday if interested for a street/track test even w/out a hood if that's what it takes to see the difference so we can all get some info..........