belt throwing issues

1968FormulaS340 said
Also, try a different brand of belt. I had this problem years ago on a Chevelle. Just changing belt manufacturers solved it.

Changing belt brands solved a belt tossing problem I had on one of my old 340 Darts.

peelo57 said
Really good way to see if belt has harmonicks or pulleys are out of alligment and belt moves side to side is to use timing light.

attach timing light to any cylinder and point it towards belt, pulsing light will make belt movement much easier to see

Thanks for the tip....need to remember this..