.484 purple shaft grind info.
When I raced my Dart, I changed cams every week for 5 weeks, then went thru 3 sets a headers.. trying to beat my nemisis..
With 12.5 pistons, A crane 331 intake.. can't remember exhaust.. was the best.. 2nd was another breed but 3rd was early purple shaft.. as far as et's went..
That was in 1969/70...