Those transmissions are the world's easiest to work on. I have built up dozens of them and am in the process of putting one in my '54 GMC right now. A word of advice... NEVER speed shift, you WILL break it! That's the voice of experience! Nothing about them is hard to do and parts are easily accesible. I just wish they would have stood up to the torque of a built up GMC 270, that's how I broke dozens of them. I have a supply of them in my inventory that should last me a lifetime, if I don't speed shift.