If the efficiency of the car remained the same with the new combo as it did with the 10.60 combo....... you’re looking for another 130hp.

I’m not sure that’s feasible with a $4k budget.

A bottle would do it.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads