I have a 71 351C 4V and this is the cam I use with a "Torker". It gives a real mean sounding, rough idle, and pulls extremely hard in the midrange. Great street and strip set up. The cam is a "Speed-Pro" pn# CS-173R, and the details are below. One thing I was told was that the distance between lobe centers at 108 Degrees is better for the Cleveland than the 110 degree lobe centers.

Intake .503 valve lift 308 duration Hyd Intake .291 lift at cam 224 duration
Exhaust .507 vlift 314 duration Hyd Exhaust .293 lift at cam 223 duration
Max intake lift 104 ATC and 108 degrees on Lobe centers.
All of this sit's below an Edelbrock "Torker" with a Holley 750 vacum secondary. I have posted on the Tech forum, the thread is called "Spread Bore or Straight Bore". You may want to check it out.