Hi Tommy,
What Scot said. Coincidentally I am about to go out and put the instrument cluster back in my '57 as I had to rebuild the speedo and odo. I do not know the breakdown of the '60 but if there is a flexible heating duct under there, it is easier to work without it. Also I usually attach the trip meter reset cable as it is generally easier to feed it through its hole under the dash rather than trying to attach it once the instruments are in the car.
Good Luck!
Dave Burke
CLC 27968