What a PITA! I have my bus connected from the front radiator bracket, through the fender, out the firewall by the pedals, under the radio, down the console and off to the rear wall. That connection behind the driver side AC duct is tough to get to. Dealing with the windshield washer reservoir area is tough too.... lots of ground wires tied in now though. Lots of my after market additions cleaned up and tied in too. Much cleaner and re-bundled. My bulkhead box has been painted with truck bed paint and will be nice and unobtrusive. I went with a weather Pak 22 connection and I crimped my leads today. Tomorrow I hope to mount the box and get the electrics largely squared away. I've deliberately separated the 'car' stuff from the engine, EFI stuff by putting the EFI behind the driver. Makes life easier.
My shifter panel will have the stock clock but I'm replacing the rheostat with my toggle that locks/unlocks/pops my doors. I'm also going to fabricate a switch plate to fit in the stock position by that will use aviator protected toggles instead of the big, obtrusive paddles. I need to move my wings aloft module to a more convenient mounting location too. I may replace my radio with a bluetooth one since my current Ipod may not last too much longer given its age.
It's always a case of 'while I'm in there'. This started as just carpets and rear bulkhead boards (replicated and ready to be mounted). I couldn't bring myself to totally recreating the parcel shelf area since I then wouldn't be able to buy replacement carpets to fit.