I talked with someone who tested 500" (4.380 x 4.15) with the TF heads last week. 256/262-112 solid cam, .567/.585 w-1.5 rockers, 6bbl, 2" tti headers, 11:1. I had told him it should make 645tq/625hp, made 649tq/628hp. I would think with the TF intake and a big 4150 carb, maybe some sort of spacer, it would make another 25hp or so.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
