So I am looking at RA, and they have listed a fuel sending unit, and a fuel pump hanger. The reason I am considering the difference between the two is because they have a Delphi fuel pump on wholesaler closeout for $45ish, and the hangers for around the same which would save me 10-20$ for a "name brand pump". So what is the difference between a sending unit and the hangers? All I can find is one includes a fuel pump, and the other doesn't. I mainly worried about fit/function not brand such I would just be using the sender and have my own pump. Any info would be great thanks!