Join Date: Oct 2001
Location: Central Indiana
Yes, power(torque) output of the engine will directly effect stall speed as well as gear ratio, type of tires, car weight, brakes.
Hy-gard can effect stall speed a bit but not as much as you are seeing. Your smaller engine likely makes a bunch less torque without boost.
Grabber Green \'70 Mach I 351C 4V 12.32 at 111mph 1.63 60ft. time
Robin Egg Blue \'79 Fairmont 408C 4V 10.50 at 127mph 1.38 60ft. time