Member "Brad Allen" posted
this reply on the belt needed for this conversion way back in 2008. If using a 5/8" wide belt, he indicated using Dayco# 23425, which has an effective length of 42.5" and a 5/8" width.
He never did come back and provide info on a 1/2" wide belt, but searching through this
Dayco Belt Guide, a Dayco# 17425 would offer a 42.5" effective length and 1/2" width to use on the narrower pulleys.
These should get you into the ball park for your belt need I think.
