Disc to drum swap and u joints

BlackBrick said
They do make conversion joints with one part of the cross a 7260 with the other side being 7290, but those can be pretty spendy. And if you are having a driveshaft welded up, might as well go ahead and have them drop that larger yoke on there.

If someone did want to go the route of the 7260 to 7290 conversion u-joint, mopartsracing.com has it for $36.95 P5007418

But if it's not too much to just have the larger yoke added, that's probably the better way to go anyway.