steering coupler replacement (how to)

I thought I'd dig out this old thread instead of starting a new one. My 71 power steering box is 5/8". so from what I can tell Flaming River may be my only option to replace my factory worn out coupler with the u-joint style coupler. They have two separate listings, and I'm not sure which would be best. I'd prefer the cheaper method. I tried to call FR but they were closed for the night, I'll try again tomorrow morning.

Flaming River Steering Couplers FR1506P
This looks like what most guys are using.

Is anyone using this one?
5/8"-36 (Chrysler) X 3/4" Smooth Universal Billet-Joint - FR1757 - 574 - 5365


Since this thread is older, how are your couplers holding up? Any issues?