In the interest of safety, I the installed the petcock where I could easily reach it by my left foot inside the frame rail. I will probably extend the bottom plate a little past the rear end of the tank to protect the petcock also. The fuel pump will be mounted beside the left side of the tank below the frame rail. I will probably have to weld a steel tube to the bottom of the frame rail to cover the fuel pump also. The problem with mounting the fuel stuff low is the extra protection, but I've found simple solutions to those issues.