phase 2; holley strip dominator, 750 holley, headers, 280/.474 cam, no mufflers, chrome ignition box. 478lbft of torque between 3500-4500rpm, 406hp at 5000rpm.
phase 3; small valve stage v, 2" headers, race oil system, 284/.528 cam/iron rockers, steel shim head gaskets. 488lbft of torque at4250rpm, 446hp at 5500rpm. swapping to .620/324 mopar cam gave 478lbft of torque at 4750rpm, 486hp at 6000rpm.
phase 4; ported stage v's, .690/328 mushroom cam, 850 holley. 500lbsft of torque at 5000-5500rpm, 560hp at 5750rpm.
looking thru the details they did use venolia flat top pistons ( the ones I played with back in the day were like 6pak pistons) with bill miller rods.
