Put the fuel pump in the tank while it's easy. It's the best place to put it because it stays cool and you can't hear it. If you have to install one externally, put it closest to the tank. Mount it on rubber to the frame, not the body, as I have learned, they can be noisy. What about a return line, don't you need one for fuel injection ? I'm pretty sure vapor lock isn't an issue with fuel injection. You can find a ton of heat shield choices at Summit for all your fluid lines running front to back.