Best wiring harness for 73 Duster

Excellent answer!! 2nd only to M&H from Year One (and theirs may take a little "nudging" despite claims of "exact repacment" M & H tech support is great, but you have to buy the year one harness first.

For my project, since I plan to replace everything, I am going with American Autowire Classic Update for Modified Restoration, not OEM. The kit has all the bulb sockets and wiring for aftermarket A/C, gauges, fuel injection, etc. The only way to describe what many previous owners have done to the wiring is - F'd Up. Must have had a sale on red and yellow wire at Home Depot. Anyway, if you plan some modern updates, this kit may be worth a look.