A friend ran a low compression 400 with a fairly large cam, and it ran good. The car also had an 8" converter, and 4.88:1 gears, so it's not a dog when operating at 4,000+ RPM
Reminds me of Mopar Muscles' 400 HP 318 with no dyno numbers below 3,000 RPM, but at 3,000 RPM torque was 332, and jumped 44 ft/lbs to 376 @ 3,500 RPM?