I Know a lot of guys like the plug-n-play types, but For a lot less money and a good way to learn about your 70's systems, I used the Painless kit.

It is doable for the hobbyist and you can ensure all your connections are solid with the proper crimping tools.

Also it gives you the option of soldering ALL the high current terminals.

With their instructions and a good color MOPAR schematic, you will understand better the workings of your system.

My 2 cents....Joe

PS. It doesn't use the firewall bulkhead, has a good main fuse system
and allows a better ammeter solution.