I'm not saying the combination on the motor is perfect, but I doubt there's anything I can do to pick up .2 for the price of builiding a 904.

408 bottom end, steel k1 crank, k1 rods, diamond flat top pistons, factory block
Indy 360-2 cnc heads, Indy intake converted to dominator flange.
1050 dominator
262,268@ .050 solid roller. .698 lift
10.3:1 compression. Pump gas motor

3000# race weight valiant
4.56 gear, 29.5x10.5 slick, ladder bar car
727 with transbrake, 5400 converter

The only thing I think that would pick the car up would be to increase compression to 11-11.5 compression. However, with the Indy moved exhaust valve, there is no radial clearance on the exhaust valve relief...