'75 360 Rebuild, Cam?

70DusterBob said

Would I be getting half the mileage on the highway? Or does it make the engine more efficient as well as increase hp?

Click to expand...

Question 1. I don’t know what your getting now and that answer
Is basically impossible to answer though in general, it is a “NO!”
Answer 2, Yes, but..... I did answer it above without realizing it.