Scott -- I hope you have been offered the available options with enough detail to make an informed decision that suits *you.*
As for me, I am still toying with the idea of doing my own rewire from scratch. But my truck is in original 6-volt configuration and would be simpler to go that route than anything modified or custom.
It *can* be intimidating at first. But I've done a couple now (rewires -- both modern harness and a repro original from Vintage Wiring of Maine) and if you just start in and go one system at a time, its not hard. Kinda fun, I thought.
Regards,
John