A-Body-Bomber
Good points as usual.
Those #670 Cylinder Heads on the Pontiac 400/360 HP loved Low-Lift and High-Duration
Bumpsticks.
Also >
Some things that would make a big difference with the 4-Speed [Stock vs. Stock}
The Plymouth GTX came thru with the 'junk linkage' Inland Shifter.
The Pontiac GTO ......... 'Hurst Shifter'
Right off the Dealer Lot, the GTX would run into some shifting problems here.