+1 on the SM319.

My 57 with 3.90 gears and this OD trans is a whole new truck. You'll be amazed at how much quieter and fun it is to drive. And can probably locate and rebuild one a lot cheaper than what you're thinking on paying for the diff swap.


Jim


1957 Chevrolet 3100 Stepside
235, 3-speed w/OD
In the Stovebolt Gallery