Hello, I have a 1988 OMC 3L with an OMC Outdrive, I have a chance to pick up another Outdrive very cheap, the only thing known about this Outdrive is that it came off a 2.3L Model # 984540 Ser. # 1046680 or 6 i want to know if this unit would be compatible with my engine. Anybody have any ideas where i can cross reference? Thanks