Chris, thanks for the additional information.  I now understand about replacing the mechanical lift with hydraulic and why the shaft has to be different.  

I was getting an order ready for Korves anyway so I'll email Mark and ask the price of the coupler.  I believe they list the input shafts on their website but not couplers.

I appreciate knowing about the bellhousing and belt pulley assembly as it will now be easier to get this back together.

Tom Murray