What Harness and any tips??

If you buy the Speedway wiring kit, be sure to get plenty of shrink tubing and & uninsulated terminals. Everyplace you put a terminal, be sure to put the shrink on first. The reason behind this is the CHEAP plastic on the insulated terminals goes to crap very soon after installation. I used a 10 circuit on my race car & that was something that I was advised to do. Just my .02