IIRC there's nothing blocking it, but I'd have to go out to the hangar to be sure. For those following along at home, the hydraulic pad is below the right mag and to the right of the fuel pump (when viewing the engine from the cockpit).
This begs another question, why do you want to mount it there when everyone else mounts it on the unused vacuum pad,Wanted to see if a standby alternator like the FS1 would fit down there.