Very easy to make a worthwhile flow improvement for that type of combo with those heads.
If the heads need a complete overhaul, then it makes sense to just buy new heads. But, if those heads are still pretty fresh, they will be worth spending some $$ on them for a little porting imo.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
