I get this question quite a bit at work, and the only one I recommend without hesitation is Howell. Whatever the difference in price is, it is worth every penny. I had a friend/customer go with a Painless instead of a Howell and he regretted it heavily when he had to have the shop do some re-working to get everything to work right. I am not, however, saying that their product is crap, but compared to the Howell harness I installed in one of my rides about 12yrs ago, their TBI harness leaves alot to be desired. Bill Howell was a GM engineer for many years and when he retired he began Howell Engine Developments. They use all o.e. quality components: all Packard TXL/GXL wire, terminals secured with o.e. tooling, Weather Pack connectors and looms it with the o.e. quality high temp grey stripe loom. Installation is simple as you only have to tap, I believe, two wires of your existing harness. I know people have had good luck with Painless, but after 12yrs in the Phoenix heat, and all of the abuse I could throw at it, my harness still looks/functions like new. Just my $.02, but if I was in the market, they would get my money again.