Can you use the ring and pinion from an open drive banjo rear axle to setup a quick change? If it makes any difference its a Rodsville QC.
In short - No. An open tailshaft pinion has a taper and a keyway which attaches the tailshaft yolk. It looks just like a rear axle. A QuickChange require six splines to fit the q/c gears.
There are 10 spline open drive pinions. That still doesn't mate with the 6 spline change gears that are generally available. Sorry!