Borgeson Power Steering Box

I am interested but have 2 questions. It is new meaning never used and that is great. However, if I need a different coupler will they still change it out since I did not make the original purchase? And secondly, will they cover it if there is a problem with it meaning will they treat that aspect as if I bought it from them?

Thanks,
John Weaver
Here is the link to the coupler in the kit. Bergman Auto Craft - Home of the Modern Muscle Car The coupler works for all mopars according to the description.