If you are dead set against power, do yourself a huge favor and stay with drums. There are kits available from all the major suppliers to install disc brakes and power assist while retaining the original under the floorboard mount. You are also able to keep the 6 lug wheels. Any modification whether just changing M/C or going full out power discs will require some amount of fiddling to make it all work. It’s just the nature of the beast. Good luck.ðŸ›