I built a ffr cobra 2 years ago , built up a 347[stroked 5.0] put apaxton on it and used the painless harness. Although i thought the painless to be a bit overpriced it woked great, it's stand alone so you will not need to interface it into the toyota harness. If you don't have the computer you can contact painless and ask them which code computer will work with their pin arrangement. Mine was out of a 91 gt and i had no problems
