The t-5 is a good way to go. I,m getting ready to put one in my 55-2. There is info in the tech. tips & a lot of past post on the changover. I don,t know a lot about rear end swaps. The price is about right from a salvage lot but might be cheaper if you find an individual parting one out or a pull it yourself lot. Most of them go to the pulverizer.