My Franken-truck has a 91 5.0 from a stang, but an intake from either (probably) an 88 or a 91 truck. The ECU doesn't have the standard Ford numbers, it's a reman from an unknown source. The wiring harness also doesn't give me any clues as any pinout diagrams that I can find for any 5.0 lists a knock sensor at pin 24. My 24 has nuttin'. Critical? Just wondering. Trying to chase down the indicators to bring them out (i.e. data port and trouble light) and Ford just LOVES to make minor mods between years just to keep you on your toes.