Driveshaft 65 question!

After the loss of several drive shaft boots over the many years I have owned my 65 cuda... I gave up replacing them and went to the spicer unit and never had any problems and was quite happy with it. But, with that said, I ended up going to a regular slip yoke setup recently when I installed a newer style Passon aluminum 833 (another long story) that I had laying around... (was going to be in a race 63 Dart, but sold the car)

Still have my both older (pictured) drive shafts (note that you local Arizona 63-65 Valiant/Barracuda peeps) available :D Just saying...