Small U-Joint, Big U-Joint??

Here is the situation::?

70 CJ5 factory :v6: with Dana 27 with "small" driveshaft u joint yoke

earlier T90 & Dana 18 TC with "big" front drive shaft yoke

I have both a "big" & "small" u joint front driveshaft, both are the same length

Should I change the Dana 27 yoke, or the Dana 18 yoke?

Which u joint is better (stronger)?

 

If the spline matches and the driveshaft yokes line up in phase, just put the two driveshafts together to make one with the correct ends. Much easier than changing axle or tcase yokes.

 

If I remember correctly, they make a ujoint big on one side, little on the other?

 

btt