PAINLESS WIRE HARNESS (thoughts)

My opinion, for what it is worth.
If you are using anything other than the factory style M&H harness, you will be wiring the car yourself, mostly from scratch. Not a terrible job if you are an electrical guy, or know your way around auto electrical systems. If you don’t it will likely be very difficult.

The OEM wiring in cars was designed for assembly line installation, so there are connectors everywhere. If you are wiring the car yourself with a universal harness, you don’t need all the connectors. You can just go from point to point. Simpler, but you have to figure it all out.

If you want plug and play, you need a copy of the OEM harness. M&H makes harnesses with popular upgrades, like electronic ignition and electronic voltage regulators.