Hi. I have a 1975 long base Chinook (toyota truck with a shell on it). I'm putting a 1980 engine and 5 speed in it. The 5 speed trans is off a regular bed pickup that had a yoke. I have the 4 speed with an output flange to transfer to the 5 speed. Both transmissions are threaded. How can I get the flange off the 4 speed and on the 5 speed. Thanks much for any help you guys can give me!