How much is it with the install kit?
Without the installation kit it comes with these instructions:
For the pump
http://www.pacificp.com/pdf/ElectricFuelPump(Online)InstallationGuide.pdf
For the relay
http://www.pacificp.com/pdf/Fuel Pump Relay Unit (Online) Diagram.pdf
For the simplest install you need two 1/2" male NPT to 1/2 hose barb fittings. One straight and one 45* or 90* elbow. Then you need about two feet of 1/2" fuel line and 4 hose clamps. Cut the a piece out of the metal fuel line (larger one) going from the tank to the engine, find a way to mount the pump to the frame (a piece of flat stock bolted to the inward side of the frame rail at the top and bottom, boxing a small section of the frame, makes a nice place to mount the bracket), clamp a piece of 1/2" fuel line to the metal line on the tank side of your cut and route it to the 90* fitting screwed into the inlet of the pump, clamp another piece to the engine side of your cut and route it to the other fitting screwed into the pump's outlet. Ground the black wire where you bolt the bracket to the frame, run the red up to the supplied relay's blue wire, ground the relay's black wire, run a power supply to the relay's white wire, and install an add-a-circuit in a keyed fuse location and run the wire to the relay's white wire.
If you do a search I'm sure you will find a write up with pictures.