Next steps: One of the reasons I bought this truck is because I had a 1965 GMC SWB when I was in high school. I've always loved the short box on these trucks, but prices have obviously inflated. My plan from the start was to shorten this truck.
I'm planning to drive it until the weather really turns to crap here (in about a month) and then blow it apart to shorten the frame and bedsides. At the same time, I plan to install an A833 4-speed overdrive that I found this summer. I'll pull the engine and reseal it at the same time.
I don't really want to take the truck off the road for long but I feel like it makes the most sense to shorten the driveshaft once. I don't plan to do a bunch of paint and polish while I'm in there either. I guess we'll see how it goes!