Steering coupler question

After reading all this I recalled all the power steering boxes I've seen with their input shaft moving in and out through the upper seal, some as much as a 1/4 inch travel there.
Made my decision, If I ever have a universal joint there it will be to a steering rack and require a relief angle.
I may go ahead and buy one of those fancy molded caps for the box coupling ( If I can find the link again ). It might come in handy later.
Happy moparing