Painless?

I already had a new dash harness, got a headlight relay harness off fabo, wired the rest myself, MSD distributor, alternator, eliminated ammeter, etc.

When I upgraded to efi, I bought a Painless 7 circuit fusebox for under 100 beans, the Mopar wire connectors that click into the stock plastic connectors, forget the name, and added a power and a ground hub.
Fusebox fit right into the stock fusebox location, powered everything with that, ignition switch, headlight switch, efi, radio, whatever else I needed, and I still had 1 circuit left.
Doing this also eliminated the factory 'splice' in the dash harness.

It progressed over time and other changes, but I'm considering the same method on my latest clunker.

It's all very neat, simple, with factory connectors, modern fuses and relays.