For those feeling threatened by this job, it can be done relatively easily, in my case under 4 hours of puttering slowly. Also, a good source is Dave Barton and his super choice used harnesses.

Unhook the ground battery cable.
Remove the intake hose from the AMM to the throttle body.
Remove the idle speed motor, sliding it out of its holder. Hoses too.
Remove top portion of flame trap and hoses.
Jack up passenger side of car and remove splash pan. Remove oil pressure wire--a push together clip. Remove the two 10 mm nuts and clips holding the wire under the engine. Take clips off wire.
Label all wires your remove---DO IT!!! You can screw up.
Remove the two wires from the alternator. Detatch the blue ground as it will be easier to work in the area. Unhook the inline connector to the AC compressor--easier to work in area. Remove clamp holding wires to the manifold-engine brace--10 mm.
Remove the top 10 mm bolt holding the power steering resevoir and loosen the bottorm one. Now lay it toward the firewall. Trace the wires from the engine and you will find a noter clamp on the fender well that needs to be removed, 8 or 9 mm I think. Unplug the large gray connector and the AMM connector.

Lay out your new harness and get acquainted with it and lable connections. Now start to remove old harness toward the engine and start to plug in new stuff. This is a real mess of wires and connectors, but your labels help.

Remove knock sensor plug and temp sensor (gray). Knock sensor wire is not replaced, just easier to work with it out of the way. Remove the two wires on the starter, remembering (write it down and label) what goes where. You will need to clip a number of black nylon cable zips along the way. Unplug the coolant sensor by the heater hose inlet on the block. Clip move zips. Go along the fire wall and try to unhoop the black zips---they will probably break. Now you can remove the harness from the engine area and install the new. Look carefully at the routing of the harness around the flame trap and dip stick.

Remove the two large phillips screws holding the coil in place, lay it toward the center of the engine bay. Clip the zip holdidng the two large gray plug and remove the one wire from the coil. After removing more zips you can remove the old harness and replace the new. Install new zips where old ones were. Recheck and reinstall things as they were.

This is a good time to service oil and flame trap area if needed. The main thing is to make drawings, write things down and lable harness ends, both old and new.

Have fun!!

dick