The Stovebolt Site Forums The Parking Lot Big Bolts 1 1/2 ton 5.43:1 gears

All,
I'm looking for more information on the RPO 5.43:1 optional gears offered for 1 1/2 ton trucks in the late 40s'-early 50's. Does anyone know what part number the ring and pinion are? Any idea what the RPO code is for this option?

Any chance that someone knows where to get these?

Thanks!

jgetti