I have mine set at 41 right now in my stock stroke 440 5000 stall 7400 shifts picked up 37 to 39 then more 39 to 41 but I stopped there for this year. Cam, heads, piston design, rpms all affect it so advance till it quits gaining et and maybe more important MPH and maybe take 1 deg back out at that point.

My EA computer dyno program says 41 to 42 so??