At the local Pull-a-Part, I walked past an aluminum Police drive shaft that someone had already taken out and went ahead and grabbed it. I know it is too long, but figured with the magical interwebbernets, I could find what I needed...
Turns out that Spicer makes a slip yoke that is 1 inch shorter from the center line of the u-joints to the surface that would bottom out against the transmission if the driveshaft is too long. So, the driveshaft is 1 inch longer, but the yoke is 1 inch shorter. The Spicer part number for the yoke is 2-3-4911x and the best price that I found was from Autoplicity. Ford used 1330 u-joints in some shafts and 1350 in others. Mine had 1350, so I grabbed a Moog 348 that adapts the 1350 to the Spicer yoke's 1310, and a Moog 447 to adapt the rear 1350 to a S44 with the internal snap rings. See pic's for a comparison and installed view of the trans output.
Turns out that Spicer makes a slip yoke that is 1 inch shorter from the center line of the u-joints to the surface that would bottom out against the transmission if the driveshaft is too long. So, the driveshaft is 1 inch longer, but the yoke is 1 inch shorter. The Spicer part number for the yoke is 2-3-4911x and the best price that I found was from Autoplicity. Ford used 1330 u-joints in some shafts and 1350 in others. Mine had 1350, so I grabbed a Moog 348 that adapts the 1350 to the Spicer yoke's 1310, and a Moog 447 to adapt the rear 1350 to a S44 with the internal snap rings. See pic's for a comparison and installed view of the trans output.