My old Duster with Hensley stage 2 eddies( peaked at 274) ran 10.70's at 3400 pounds with a flat tappet. 416 motor.
Full interior,all steel, bench seat, 300 pound driver, yada, yada. Small tube headers, weiand excellerator, 727 trans, super stock leafs.
Made 70 mile round trip jaunts to the track in this configuration.

69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam, footbrake street/strip car

1.41 best 60 foot
6.54 @ 105.20