318 low budget heads change

I'm not sure.

Years ago, I had the same cam which is presently in the Dart, in my old Landcruiser. The cam is an unknown independent mechanical regrind that's supposed to be "about the same" as the 68 340 cam.

I once had a smogger mid--70's 318 in the FJ-40, with 340 J heads, and seemed to me it was a little doggy "at the bottom." LC had 4:11 rear, A-833 4 speed and Jeep transfer case

The present 318 in the Dart is a similar engine, (mid 70's smogger) except stock heads. Headers, 727 TF, and 3.7X rear gear, runs about 3300 at 70. It seems to me it's a LOT better at bottom end with the little heads, but I'm not sure it "gave up" much on the top end, either. The fact is, for what I have into it, it's fun to drive.

In other words without taking measures to gain back the lost compression, I'm not convinced the "big heads" are worth it. These smogger engines are already low compression, and run just fine on cheapest fuel I dump into it. I'm not sure I'd want to lose any more compression for bigger ports..