Hello, I was planning on installing the reverse lock out linkage and noticed my Muncie trans is an early model with the shift shafts being studs and not set up for bolts. Are the shafts interchangeable or do I need a new cover and shafts. I think I found a conversion kit at tub trans.com but before I she'll out $200 want to see what other options are out there. Also the gearbox transmission inc, sells a bushed side cover gear box kit that looks like it could work too. Thanks,