I'd run a Late Hemi with a turbo. Stock block and forged crank will hold 1000 HP w/o issue. Stock heads are very good. aftermarket piston/rod for boost. Use a knock off Drag Pac intake. 20 psi should get it easy.
That’s the future right there.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads