I have both a Lupo and Ultimate 9.5, both were very close. I have run 8.76 withe the ultimate loosened to stall 6200 behind my 528 cube 440-1 motor making about 780 ft lbs torque at 5100, 860 hp by 6200? 3055 race wieght, torqueflite.

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky