72 Demon Power Steering Gearbox/Coupler Help...?

I looked on the Mancini site and saw the one on there as a U-Joint coupler. Hard to tell if this is actually for a power steering or manual steering box. It seems like 90% + of the couplers out there are for manual or p/s to manual conversions. I do not know the spline count on these. I'll have to check with them directly. Any one else that has any insight, it's greatly appreciated!
Mine is power steering. That's why if you do go with the U-joint setup Its best to call the company you're getting it from and make sure you're getting the right one. I don't remember the spline count and not all the steering shafts are the same as well. I wound up sending pictures of what I had to Flaming River and got the right coupler the first time.