Whats everyones preference on u joints?

FWIW, any u-joint that has a grease fitting in the "cross" between the bearing caps should be installed so the fitting hole is under load/compression.
I didn't know that Spicer solids were not available in 7290. I've only used 7260 and more recently, 1350 in my Aspen wagon on the Dana 60 end.