My issue with the universal wiring kits is that they use GM wire colors which are different colors than on the Mopar.
Also, they usually don't have all the correct terminal ends and option plugs.
If it is mostly stock, the M&H replacement harness will save you time and hassles as it just replaces the original. All the option harnesses can get expensive, but it will save you about a week or more of time compared to wiring a "universal" kit.
If you decide to use an aftermarket wiring harness, make sure the wires are cross-linked polyethylene (XLPE) insulation as per SAE-J-1128, Ford M1L-85B, and Chrysler MS-8900 specifications. Usually sold as GXL,
SXL, and
TXL are all types of cross-linked automotive primary wires. These wires all have high-temperature resistance of 125 degrees C (257 F) and great flexibility. The main difference between these wires is their insulation thickness. TXL wire has thinner insulation than GXL, and SXL has thicker insulation. You can learn more about the differences between TXL and GXL wire
here:
TXL Wire vs GXL Wire | Allied University
The Polyvinyl Chloride, also referred to as PVC, is a thermoplastic material. The cheap harness will use the PVC insulated wire.
PVC was common on our old cars, but because the insulation is a thermoplastic material, it melts when it gets hot. The "GPT" wire is only rated for 80 degrees C (176 F), And the highest temperature rated PVC wire is "TWP" rated for 105 C (221 F).
A You tube video by American Autowire shows how the insulation(s) react when they get hot from an overload current:
I haven't bought wire in awhile, but the GXL wire was not much more expensive than the GPT wire, and the teflon (Tefzwl) insulated (tin plated copper wire) is about 4 times more expensive than GXL wire.
From
acwire.com, 1000 feet of 16 AWG wire, in black insulation. GXL cost is: $82.81 M22759 wire is: $305.22 For the PVC wire they want you to request a quote.
I think those are pretty good prices from acwire?
Home Depot wants $117.95 for 1000 feet of GPT wire, which likely is around $50 to $60 from acwire?