Hi Guys
when i installed my white gauges i pulled my needles off to put on the faces and then to clean and spray the needles...they are on a conic tapper much like a tierod end...we marked the eddy current to the speedo housing to the needle shaft...the other gauges were marked and set...everything is still working/reading fine two years latter. i would suggest staking your odometer drive gear (drill on a angle the brass gear and press/tap a keeper) to the shaft as it is just a press fit from the factory...mine was not spinning when i bought it.
-Jake