Mike,
You can replace your non ported hydro pump with a ported pump from a wide frame/quiet line Cub. You may have to do some fabrication to make the the spool valve, hydraulic cylinder, and lever to work on your cub. You wll need a dual spool valve to lift and control the blade angle on your blade.
There has been a few narrow frame hydro Cubs with a single spool valve at plow days.
The factory hydraulic system for a narow frame cub has only a single valve set up in it.
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