Front driveshaft interchangeability

[idoc]

I have a wag that has the running gear out of a 70 wag, (Dana 20 TC, Dana 27 front axle). I was wondering if the front driveshaft out of a 75 Cherokee, (QT TC, Dana 44) would swap in.
I put them next to each other, and length wise it looks OK. I'm not sure if the U-joints would be different though?

[Stuka]

u-joints should be the same 1310's.