Trial and Error. If the motor is not seeing over
4500 rpm, I would say yes to the 318 heads. Cam
choice is limited with those heads. Otherwise, a pair of
1.88 int valve 360 heads would fit the bill better. Just have them checked and set comp. in the 8.9-1 to 9.2-1 (no HIGHER than 9.5-1) range, by
either milling the heads and/or zero deck w/flat top pistons.