There is no way to mount the stock unit. As for the pump, I had no problem getting the pump installed. It delivers 45 GPH at 48psi.
The exact module for the gas gauge is a MeterMatch from Technoversions. It is 44.95 plus shipping. If you have the old mechanical style switching regulator still in your dash, you will have to use the MeterMatch-VR as the power source has too much switching noise to accurately activate the gas gauge.
With the tank empty, you set the "E" reading. Then you fill it and set the "F" where you want it. lYou can also set two other readings, presumably 1/4 and 3/4 to make it accurate through the range. On the non-voltage regulated unit, you can also hook up an LED for low fuel.
Craig