The Saginaw will bolt to a 1948 and later clutch housing. The 46 clutch housing has a different bolt pattern than the 1948 and later. Back about 25 years ago, Patric Dykes had someone in Minnesota making adapters for a Saginaw to fit a torque tube, Patric was the guy that developed the 3.55 ring set about 35 years ago. Patrick went out of business several years ago and died shortly after that. And I can't find the name of the guy that made the adapters.