Big Issue on harnesses from Classic Industries
The M&H harnesses that I have used have been perfect.
One common issue is that Mopar used additional harnesses for every accessory. You don’t really find this out until you order them and find out stuff is missing for the particular options your car has. Trunk lights, interior lights, ac, transmission harnesses and a bunch of other stuff all may fall into this category.
All these accessory harnesses cost a disproportionate amount of money compared to the main harnesses. I have fabricated or reused some because I didn’t want to pay $50 for a harness with 2 wires in it.
My 69 barracuda is a Frankenstein with parts from different years & cars, so that also adds to the wiring issues. Could thus be the case in your car?