Johnny, do you or anyone else for that matter know if the flange on an H55 is a different size bolt pattern than an H42 for the front drive shaft? For some reason, I can't get the front drive shaft to go over the mounting studs on the H55.
It's not a difference that has to do with the transmission, it's the transfer case.
It's been a few years since I sold you that, but I was running a double-cardan driveshaft on that case. The reason why the rear companion flange has holes instead of studs is because I drilled it to work with both patterns, early and late (DC and non-DC). I thought that the front flange was drilled the same way, but with studs pressed in for the pattern I was using at the time.