I have an 82 C10. I have already installed a new Chevy Performance SP383 and have a FITech fuel injection system that I am going to install along with the G-Surge fuel pump. I also swapped out the driver's side fuel tank with a new tank and sending unit for an 87 chevy truck. I am running into some issues now as to how to wire up the new sending unit to the older wiring in the truck. Do I need a fuel safety switch along with a fuel pump relay. I am not very savvy on the wiring for a truck. Any help will be greatly appreciated. Thanks again for reading.