I am looking at a 1996 24 ft. celebrity with a Volvo 5.8 engine.there is no outdrive on it .it says Volvo on the gimbal ring but I think its a late omc drive.being a 351 motor I am under the imprwession that its a king cobra with shifting in the top housing.i am not having much luck locating one of these so I better make sure I am after the right part.can anyone verify this and also what gear ratio would I need.? thanks