Without to much trouble you should be able to switch third members but I think there wasn`t to many options for ratios but 3:90 to 4:11. They did have 3:54 in the 46-48 Chryslers but I don`t know if they inter-change. My 52 Windsor had 3:90 so I just switched to a Ford rear set up out of a Bronco then I could go with almost any combination that was avaliable for 9" Ford. The Bronco was out of early 70`s and was the 3300 lbs axel unit and it has the 3:25. I use it with the big six ( 265 ) and fluid drive and it pulls well with the higher gears. Lot less revs on the motor--roughly 15-18 percent less. Check this option if you like--I think it should be narrow enough to fit under your car. Any good speed shop should be able to do this without to much problem and shouldn`t cost an arm or leg. Good Luck...52er
