You now should have a complete ready to install sender to work with your LS Swapped Square Body!
I used push lock hose and fittings with -6 ends to connect the sender up to the rails on the engine. Quick and effective. For the metal lines on the fuel rail on the intake, I used the same Earl's fitting without cutting off any of the factory line. Sorry, I don't have a picture of that set up...
My son has also done this same conversion using a Walbro 400/450 pump. the only thing he had to do different is the bracket on the bottom of the hanger needs to be cut off and a hose clamp used to hold the pump to the tube next to the pump. That set up supported his 550RWHP on his turbo'd 5.3