To get 500hp from an aluminum headed 489...... that would be a very mild user friendly combo.

Pump gas, HFT cam, no problem for power brakes, occasional DD use.

Never have to take it over 5500rpm.

Same type of build and hp/ci as a 450hp 440, or a 390hp 383.


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