Borgeson Power Steering Thoughts....

First off, you cannot get the same by rebuilding a stock Mopar unit. There will still be the common 11:00 to 1:00 free play in the wheel.
Within this range, the wheel moves but the tires don't. Call it slop, free play or whatever, every Mopar steering box has it whether it has been rebuilt or not. It is a design feature/flaw that cannot be completely eliminated. These steering boxes are between 35-60 years old and no new parts are available. Rebuilds get done with refurbished old parts which will still have that slop in the steering. The Borgeson is a new unit. You're starting with zero wear, zero miles.

Secondly, yeah...you can piece it together but sometimes that ends up saving you nothing. The Bergman hybrid coupler also isn't cheap but it makes this wap a bolt in job that is reversible if you decide to go back to stock or something else. No modifications to the steering column.
yeah, that's kind of the basis for my argument: you can get something similar, but it's not all the way there. and for the price, you really can't beat the complete package-- all that time spent dinking around for bits and bobs and extra shipping or cleaning and painting adds up.

the hybrid coupler is the absolute cats *** here. no muss, no fuss and like you said, reversible if you change your mind down the road. not modifying the steering column is damn near worth the price of admission on its own.