Need a little schooling on steering couplers

Thanks a lot for the advice, guys, I don't think I need a u-joint because the steering column and the steering box are right in line with each other. I think I just need a regular coupler, but I'd like to find one that doesn't need to be stuffed with grease because it is right next to the exhaust. I will check out all the sources and then post again with the information that I find.