Chuck check out my build thread in my sig. line.
I have the 351w,C6,203/205 doubler, I ended up with a 14 bolt rear because of the length and a D60 up front. My rear DS measures 22 1/2" long from enter of the yoke to the center of the CV yoke. I have 5 1/2" of lift and run big Bronco DS that had been cut down. The rear slip is a 1350 spicer yoke to match up with the GM 14 bolt and the CV has 1330 joints in it. I used a rear spring perch from Barns 4x4 that has a 1" offset centering pin to relocate my rear 1" back. The front shaft is a one ton DS from the 88" donor truck, it also has the 1330 CV and the axle end is a 1330. Both CV's have been clearance for more angle and I had to put a limiting strap on the front to keep from binding the CV at full droop. The front axle is also pushed 1" forward with the Cage mounts and had to have the front shaft shorted. The motor, tranny and t-cases are tilted down a little to eliminate some of the rear DS angle.
Hope this helps, any more questions let me know. I would be glad to help, sorry I still don't have all the pics of my ton swap on the build thread. I was trying to get it finished for Howiepalooza last weekend. I just made it and haven't taken time to post the rest of my pics.
David