Cam phase suggestion advice

I think the way to go about the key offset is figure out the distance per degree on the surface of the crank snout. Circumferance is 2*Pi*r (or Pi*D) If crank is 1.5" diameter then C = 2*3.1416*0.75" = 4.712"
Divide by 360 >> 4.712/360 = .0131" per degree

two degree key would be about .026" offset.

Someone needs to check my math and you need to use the real crank dimension, I was just guessing and using 1.5" as an example.