What kind of gremlins are you having? As long as the bulkhead connector isn't melted, there really shouldn't be a whole lot there that isn't fixable for pennies on the dollar.
I just went through all the wiring gremlins on my car and it was relatively pain free. It's just grounds, hots ran to the battery and switched ignition. A handful of butt splices, a few connectors and some heat shrink and all the cheap aftermarket gauges and house style wire nuts are gone and everything is back to looking clean again.
Most annoying part is my misshapen head after banging it on the dash repeatedly while working underneath it.
