why don’t you just raise it a few inches …if you can build up the transom it should fit see my 50hp merc years ago great rig!!
I installed 2 x 3/4 marine plymood plates to replace the original (low) transom wood and one angle iron on top on which the Merc sat.
Built a console to sit on the middle seat with cables extended one one side back to the Merc.
Joining AOMCI has priviledges 🙂