Your fuel shut off for an electric pump may be turned off by the ignition system. A separate switch may also be used. Both must be turned off when the battery disconnect is actuated.
.A manual fuel shut off is normally used for mechanical fuel injections ei: Hilborn, Kinsler, Enderle etc.
.You may do a few things to have 1" lugs. Using long studs and normal 13/16" lug nuts, you can make a 1/4" plate with holes in your lug pattern and place it over the exisiting nuts and place 1" nuts on backwards flat side against the plate. This give a double protection and during a spin this is extremely important.