I buddy made the standalone harness and its not vehicle specfic its the lt1swap.com harness so it can go in any vehicle. My engine is a 01 5.3 converted to dbc and 80e swap. Truck had the 350 tbi in it. So now im merging the standalone to the truck harness. So from ls harness its tach check engine vss tcc fuel pump 12v constant and key 12 volt