So, what did it do? Our EFI-fed Motown 454 small-block, with 38 degrees of total timing, topped out at 567 hp at 5,500 rpm and 559 ft-lb of torque at 4,800 rpm. Actually, horsepower hit 500 by 4,700 and hardly fell off after the 5,500-rpm peak--it was still making 565 at 6,100 rpm. As for torque, it hovered at 500 ft-lb from 3,000 rpm until 6,100. Don't forget, this is a small-block! We're more than thrilled with the results.