How long is your rear driveshaft?
Yeah, really. I had a CJ-5, the 304 was shot and I found a 305 Chevy, bought a Turbo 350 transfer adapter from Advance Adapters. My buddy and I got everything mocked up and we realized that rear drive shaft was gonna be STEEP. He said the only way it would work was to tilt the rearend up directly inline with the shaft and he said the pinion bearings wouldn't live long 'cause they wouldn't get enough gear oil. I sold the adapter to another friend who had a Scrambler, it didn't matter for that thing since it was so much longer.