Haha this is perfect timing.
I have a 1970 Chevy 292, motor came with an alternator that was a 2 shive pulley and a 3 shive harmonic balancer.
I bought a reman alternator from Advance thinking it would fit fine - it doesn't The pulley groove isn't far enough forward. The 2 groove pulley on the stock alternator I have fits.
Glad you got yours figured out.
