Hey the box is there for a reason. I feel safe in it. grin. Jokes aside, I am happy with being creative, but I know a mismatched compressor/coil set will end up with unsatisfactory results, and more than likely, kill the compressor long before it is due. that and even with a deluxe control setup(which is seized) I cannot control the a/c without really jury rigging things up. I'd like to be cheap, but being cheap can cost me more than paying for a kit, and the a/c was something for a later time. The pumps are 2 different heights, one being 5 5/8, the other is 7 1/4. I am guessing there is a difference, but I do not know if it is enough to be concerned over. Also, the belts are not the problem right now, the water pump hub sticks out too far to be a concern.