HARRY - I'm re-printing my first comment to Bill J about the power angle kits IH sold.... you must not have read it,"IH made a hyd angle option or kit for the manual angle blades. You needed auxillary outlets to run the cylinder."
Since hyd lift was required for the aux remotes, me saying he needed remotes also means he had to have hyd. lift.
That being said, if you had live 2-way hyd on ANY Cub Cadet, even a NF or original}, adding the hyd. angling kit would allow you to angle the blade while using a manual lift blade also.
DON T. - Dad gave me a pair of those VW exhaust tips from a Beetle back around 1965, he used big electrical conduit to braze up dual exhaust pipes for the #70. I had a straight pipe on it about 2-3 ft long with a rain cap but the little K161 didn't have enough HP to open the cap at less that wide open throttle. Very annoying!