What kind of shape is it in? If it's in good original condition and does run it might be worth it. Mower decks for them are out there if you look.
If you decide to take a look, do make sure that the engine does run and runs well. I paid $500 for mine, with the 38" 2 spindle timed deck, and took it home running, but with a blown governor. Now the engine is apart and also needs at minimum a new connecting rod.
Also, the rear PTO was optional on all the gear drive Cub Cadets but not super common. It had odd splines, spun the wrong way, and wrong speed to use 540 implements. Company called Hub City made a conversion gearbox that converts the PTO to the correct rotation 540 PTO but these are quite rare.
As for an engine mounted PTO, the Originals did not normally have one, rather they just had a belt directly to a center pulley on the deck. This pulley moves from side to side with a little foot lever on top of the deck, adding or releasing tension on a smaller belt that runs from the center pulley to one of the 2 spindles, allowing deck engagement/disengagement. The 2 spindles are then driven in time with a cogged timing belt. Later there was an optional kit to install a later 70/100 38" 3 spindle non timed deck using a standard PTO on the engine, though these aren't very common.
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'70 107 with k301 engine swap
'71 106 with 38" deck
'70 147 R with factory replacement k321, 42" deck
'61 Original with 38" timed deck
'63 70 "pinkie"
1863 with 54" deck
'46 Farmall H, '50 Farmall Cub
105 x2 (parts)
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