Hay Marsh, Try a 70's truck one piece shaft. Like I said, you will most likely need to have it shortened. Look for one in a automatic trans'ed truck at the local bone yard. You will need to make sure the yoke on the trans/shaft and shaft/rear-end will be compatable with a universal joint you can get over the counter. I had to get a special universal joint to use on the yoke for the drive shaft/trans coupling, but found one at NAPA. I got lucky and found "the old guy" at the NAPA counter. I described what I had, (one piece drive shaft mating to granny 4-speed) and he says, (I'm not BS'n, this is a quote), " Oh yah, You need a bastard u-joint." He goes in the back and returns with the goods. The previous owner had installed a non-bastard joint that caused the rear bearing and seal to fail on the trans. Good luck.
Regards, Dennis