683.7hp@6800 with std port heads and an ootb manifold........ and a less than optimal small venturi carb that tends to richen up slightly at the top end.
A more optimized, slightly bigger carb....... along with some oxygenated fuel....... probably coulda squeaked a 7xx out of it.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads