World block, 4.5x4.5(572), 14:1. Indy 440-1 CNC 345, Jesel 1.7, .780 cam, no vacuum pump.
Heads flowed 377/282 @ .750

440-2/440-2A with 1150 - 786tq/872hp
Indy TR, 2 x 750's - 811tq/911hp

9.04 @ 148 at 3660lbs