Aftermarket harness.

lilfontleroy said
^^^what he said! x 10.. and I'll go one better ~ here's a link, it sounds like the 12 Standard will do it
https://www.ezwiring.com/shop?Collection=Wiring+Kits+&+Switches

Thats the one I used, had it really neat untill I switched fuel inj. , and then started adding stuff , wish I`d gone w/ a bigger set up .
And got too old to redo it !