1971 Duster 360/727

Rumblefish: Alright got it. What difference does the ratios do?
I decided to not buy the heads, he had other people who were interested and it was going to be more expensive than he thought. He didn't really want to "destroy" the heads by putting in bigger valves either. His point was that you lose too much torque in the lower rpms like below 2500rpm.

I also asked him about my heads and apparently they're not X heads but just usual -75 360 heads