It is my understanding that the 75 wiring is similar to the 76+ wiring aside from a few 75 specific items. (ie Spartan Turn signal, ignition on dash) The Painless 10150 is the new version of the 10110. Called Painless and the Engineer that designed that specific harness said with some slight modification ("rerouting dash wiring") it should be a the closest to a direct fit. I have read many threads on different forums but I am still a little unclear as to what exactly won't be plug and play between the 10150 (10110) and the 75 CJ5. Edit: This thread contains a few users that chose the 10110 on their 75's: wiring harness 75 cj5 choices Any wisdom would be appreciated.