New guy here. I have a 47 1/2 ton with the 3 speed that I'm working on. I can get a parts 50 3/4 ton that has a 4 speed. I was thinking of using a saganaw 4 speed but have been told that I will have trouble due to the park brake lever. So I'm thinking about using the 4 speed from the 3/4 and using 3:55 rear gears. Would I be smart to just use the 3 speed and 3:55? Also will the 4 speed bolt up to the 3 speeds drive shaft tube? How about the park brake? Can I keep my park lever beside the shifter or not. Thank you for any ideas you have.