Alright, I've been educated...here is what to do for a '69 when you want to convert from an idiot light guage to a rally guage:

Remove the cluster from the dash. After removing the electrical connector from the old cluster, look at it. There are numbers 1-6 on the top and numbers 7-12 on the bottom. Switch number 5(Tan wire) with number 7(Brown wire). To remove a wire, go from the front(the side that plugs into the cluster) and insert a small screwdriver under the pin to release the tab that holds it. Be sure to expand the tab out before replacing it into the new location.

You will also have to replace the oil and temperature sending units. These parts can be bought; one place that has them is Performance Years: part numbers GME46 for water temp. and GME43 for oil pressure sender. Total price for the 2 sending units is 33 bucks.