Put the '66 on the Dyno today to see how the motor performed. Not bad for a 289! The #s are standard corrected at the rear wheels. The flywheel #'s (how you see cars rated in advertising now) would be 310 hp and 334 ft-lbs torque. For comparison, the Mach put down 302 rwhp and 327 ft-lbs torque (flywheel #'s of 365 hp and 395 ft-lb torque).