Anyone here actually swap there 27 gallon tank for the 36 gallon fuel tank. I have Extended cab 6.5' I know the 36 was option, found used tanks from 150 from various junk yards, but what all do I need, it longer but is it deeper??? do I need the straps?? Also the pumps have different part#s but what is differeent, cause if they are same height the fuel level should be the same right?? thanks