AMP bypass

Not clear what you are proposing. There's no reason to run more than one "hot" wire from the battery to the front. Use a 4 terminal (DPST) disconnect, which has two large and two small terminals. String two no14's up front, and use those to fire a relay or continuous duty solenoid up front to control ignition loads, fuel pump, etc

Either get yourself a nice big insulated stud for a junction up front, or if you don't have much additiona wiring (fans, pumps, etc) just run the battery to the starter, and a jumper up to the starter relay, or vice versa.