Thanks for the reply. I don't have the power accessories, but do have the EFI setup. I'm concerned with ECU location and harness routing. I think I can route much of the conventional wiring through the frame rails as suggested and be ok there. I had planned to mount the ECU up high under the dash, but am concerned with dirty/noisy interference from other components. I need to research this part of the wiring further before I start mounting stuff. Any suggestions on this would be appreciated.