Just shows that cubes and a big cam can only take you so far when the intake flow is limited. The tq number is really low for a 4.25 stroke(496 = 383 block +.060 with a 4.25 crank?)........ perhaps the cranking pressure is really just too low for the cam duration.
Seems like a set of TF270’s and a big intake would be worth about 100hp.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
