LSX Conversion Wiring Harness - Hawks Third Generation LSX Conversion Wiring Harness - LS1, LS2, LS3, LSA, AND LS9 applicable. When doing a LSX Motor Conversion into a Third Gen Camaro or Firebird you will need a new modified harness. These harnesses are made for plug and play action, however there may be some modifications that may need to be done during installation for your specific applications. Southern Performance Systems: Gen III Wire Harness Kits If you are building a Hot Rod - Muscle Car - Off Road Vehicle then our Plug-N-Play Packages is as easy as 1, 2, 3. All Wire Harnesses are tagged and come with instructions. All Custom Gen III Wire Harnesses are professionally built to excede OEM standards. The harness shown on the page is an example of a LS1 with 4L60E setup.