I'm running a Crane 0.484 lift/226 duration cam with Rhoads lifters in my 69 GTX that has A/C and power brakes, 9.7:1, runs great, a nice combo. On the 63 Dodge with manual steering and brakes, Eddy heads and 850 carb, 10.25:1, using the old school MP .509 cam 4120237, runs a little rough but just sounds great, and lots of power, no problems on the street with it.