Lee,
Heres my thinking...
Not pulling your intake and doing a "bolt on" shoe and ride plate will work. BUT i think it might not be the best for you in your situation. Im not an expert and i dont know anything for sure. But im thinkng that with a "bolt on" shoe, it will be fairly far below the keel. It will grab a LOT of water and load the pump hard/create stern lift.
Im thinking the bolt on deals are good for stuff thats in the 60-75 range. But being in the high 80-low 90 range i dont know if its a very good idea.
Anyone think im wrong? I really dont know for sure, just guessing here.
I think the best option for you right now might be the Place diverter plate/droop. this way you dont have a shoe hangning way down below the keel, and you still get the benefit of a ride plate.
GT? Flusher? Daniel? Anyone?