[Jonboy]

I thought the '89 might have used a cable driven speedometer. I've never owned one of that body style, it's still a new truck to me. You could locate the cluster out of a 90 4wd or 91 Suburban, and use it. Those use an electric speedometer, and will bolt in place. You will have to repin the connector and run a new wire to the speedometer, though. I've used them with newer engine swaps (LT1) that have the buffer in the PCM, so you will probably have to reuse the DRAC with that cluster.

There is nothing wrong with being cheap (although I prefer the term thrifty), but I also like to think I know when to pick my battles. I went ahead and bought the harness I did because mine was in pieces, and it was only $245. I need to reflash the ECM when I get my truck back to change tire size and kill the emissions inputs, but that is only another $60.