Slip Yokes

Does anybody know if the driveshaft slip yoke from a 727 CBody will fit a short tailshaft 833 four speed?

I'm in the process of upgrading the driveline in a Duster with parts from the '70 New Yorker I junked last spring. I bought new 28" Yukon axels/bearings and have the rear housing at a custom shop being narrowed now. The only missing link is the driveshaft. I located a place to shorten and balance it, but don't know yet if the slip yoke will fit. Need to use the large U-joint yokes from the New Yorker and/or get ahold of a new slip yoke, if neecssary.

I'll just try it next time I have a chance to get under it and pull the driveshaft. Sure would be nice to know ahead of time though, so I could just start looking for a new slip yoke if I need it.

Tks...