This is going on my 50 styleline with 200 4r. I am converting to open drive. Trying to figure out the length of drive shaft needed. I know there is a need for a 3/4 to one inch gap so the slip yoke does not bottom out but how much of the yoke is needed to ride on the tranny shaft. There were some with a close enough length on the drive shaft itself but they had a really short slip yoke and I just wasn't sure about buying one till I figured this out.