jeepfreek, can you post some pictures of the relays and wiring that you are talking about. Did your 89 have a fuel injected 2.9 or 3.0 V6 or was it a 4 banger? If your truck it was already fuel injected it should be easier than what I had to do. I converted a carbureted 2.8 V6 to EFI 5.0. I had to look at wiring diagrams from the 84 Ranger & the 92 Thunderbird to figure out where to splice in for power for things like the fuel pump and ECU. Do you have the wiring diagram for the Thunderbird 5.0? I eliminated the EGR valve on mine and some of the emissions valves, but I had wire in some resistors and a EGR Eliminator to fool the ECU into thinking they were still there.