All the load carrying circuits need to be upgraded.
In some cases, it may be beneficial to add what some would call a subpanel. An auxilary fusebox for the accessories.
Things like amp meter cant handle anything more than the original designed setup and we all know bulkhead connector is already less than adequate.
Alt upgrades need some planning.
I figured as much. So if one is going full aftermarket gauges and full aftermarket every thing else, as is the case with my dart, would an aftermarket harness be a better idea?