Hi ecolbeck
Joel from Earth Tools is definitely the one to call, as he has a livelong experience with both the BCS and Grillo brands.
Have you considered buying a BCS 732 instead of a Grillo G85D? That tractor would also give you the 10 HP Kohler engine and the lockable differential that you are looking for, and you wouldn’t have to worry about more adapters than the one you have already.
As Joel points out in FAQ #17, you can usually have an adapter if the tractor and implement has a different PTO flange/shaft, „
if the PTO shaft turns in the proper direction!“ This is the reason that you can use your BCS 730 with the older spline sickle bar mower and snowblower, as both tractor and implements are build for a clockwise rotating PTO shaft (clockwise, when looking at it head-on).
As Joel also points out, that when working with a rear-PTO implement there are no problems, as both tractor brands have a clockwise rotating PTO. When using front-PTO implements though, the PTO on the Grillo will rotate counter-clockwise! As there is no adapter available that will change the direction in witch the PTO will rotate, most implements can’t be switched between BCS and Grillo tractors. The only exception is probably the sickle bar mower.
So, going back to your original post, I think that you will be able to use your sickle bar mower with a Grillo tractor, as it doesn’t care which way the PTO turns, but you will not be able to use your snowblower, as the auger and impeller will turn in the wrong direction
I also think that you might get some additional information by reading Joels FAQ #12 and #18, if you haven’t done so already.
Best regards
Jens