Ok, so it was all in at just over 3100, and we slowly walked it up to almost 4900. From that range of 3100-4900 it didn't retard even one degree. By ear I'm shifting this at about that rpm being a stock 360. I will say, all in at 3100 rpm's seems quick for factory springs, not sure if the HEI plays a roll in that or not.I plan to redo this test, but better set up to capture the RPM's and the curve. More accurate so to speak.















