I run that cam in my duster. It idles decent and pulls hard from 2500-6000(sure it has more still but rev limiter) I am running 71 2.02 J heads 10.1 with no issues. 6 pack with nitrous
video of that cam pulling to 5k
For clearance you would have cam installed rocker on and get to the highest part of the lift to check to see if the retainer hits the valve guide where the seal goes. I don't think my j heads were touched and had no issues. 1.5 ration rocker
