So at that point, I went up to our local driveshaft shop to see about getting a shaft built. He gave me 2 different yolks to try. Went home, figured out which would work best, took a measurement and gave him the specs of the truck. He build a stout 4" shaft with 1350 joints on either end.
Then I took a couple pieces of pipe from my Speed Engineering builders kit and clamped them to the headers so we could bust it off and have the rear o2s be happy. We got it to run for about 30sec before the fuel pump died. This would begin a long saga....