1) This
mast step fits boats with the optional furling mast only.
2) When used during production, the Catalina factory modified this part for an appropriate fit for the boat it was fitted to. The modified part is no longer available.
3) When used on the deck stepped C-34 mast, all 4 corners must be trimmed by the customer to accommodate the halyard plate.
4) When used on the keel stepped C-36, the forward starboard corner of the step must be trimmed by the customer to accommodate the shape of the cabin
sole. In either case, the
mast step must be drilled for your boat's mounting bolts.
5) The Catalina 350 furling
mast step did not require any modifications. However later Catalina 350s did have a different
mast step that would work for either the standard non-furling rig, or the furling rig, so your
mast step might look different.
This part is only for the in mast furling rig. 
