Power advantage between Ford 351, Mopar 340 and Chevy 350??

Yep, agree with that. Chry had a great product in the 340.
Back in the 90's my old grocery getter VG 770 318 hardtop ran 14.1 at Eastern Creek with nothing more than a 208@50 .420 lift Speedpro cam, 360 exhaust manifolds, dual exhaust, Street Dominator manifold, 750 Vac sec Holley, 904 (stock, no shift kit) and 3.7 gears.
Just stuff I had laying around. Would have went a little quicker if I had bothered to tune it better.
The rest of the motor was factory stock.
So getting those factory cars to go better was not a real stretch.