Gear swaps between cases

Pinion size has nothing to do with which yoke size you have. Measure both yokes. They may be the same u- joint.
That would be a really good thing, I wasn’t sure if they would possibly be the same as when six states built the driveline for us they asked if we were running a big pinion or small pinion so I just figured it would make a difference. I’ll take some measurements and let you know what it looks like. If it’s all doable then the answer will be swapping the sure grip into the 741 to get the 3.55’s. Of course I did see that dr diff has sure grip units in stock. Maybe the better answer is to get one of those and have a couple sets of sure grips.