The stock truck pump was way too tall to fit in my tank so I had to shorten the springs and the rods that the bottom half (which includes the pump) slide up and down on. To make it work I also turned the bottom half around 180 degrees and notched some of the plastic housing for the fuel line between the two halves and rerouted the wires to get it short enough. I was honestly surprised that I could make it work as easily as I did.