Last year I had a switch array:
I had all electrical components switched so I could turn them on an off separately (water pump, fuel pump, fans, compressor for shifter, and ignition).
The problem is that you had to turn everything on separately and in a certain order.....this also means that you could forget to turn on the water pump or fans (it happened in pits). My pop had trouble with the order and it was especially difficult when suited.
This year I installed a second high amperage battery disconnect on the dash, with a 4 gauge lead to a distribution block that turns everything on or off. Now all one has to do is turn on the on dash disconnect switch and push the start button. No chance to forget to turn something on or in the wrong order. The drawbacks are that you need a lot of battery to start the motor with all the crap running….you also cant run any of the systems separately if you wanted. We have a generator in the back of our tow truck with a massive battery charger and two Optima yellows so power is not a problem.
This annoyance seems like a small price to pay for the ease of a 1 switch does all setup.
Anyone else do this?