I am trying to do that exact swap at the moment. A friend found this cluster on ebay for $37, so I figured I would give it a shot. I am going to use all of the gauges out of the cluster since I would have to have a new gas gauge anyways. I will hopefully know soon whether or not this will work.
A pic of my progress thus far.
All wires going to a connector on the back to make for easy removal of the cluster if need be.
James