From what I understand, the 67 to 72 3/4 ton carriers are a direct swap to the 47 to 55 trucks. If the carriers swap, then the splines should be the same. Maybe somebody else can chime in and correct us both.
Ralph


rtlopez@shipleysystems.com
48 Chevy 3600 w/235
48 Chevy 3100 w/235:
You cant see the smoke on a dirt road.