Hey folks, I have a 1984 Yamaha 200hp(200AETO)25in. My lower unit has a chipped cavitation plate plus leaking seals. Which other year model lower units will adapt to the '84 casting and bolt pattern? My options are to do a re-seal/weld job to the current LU or find a used/rebuilt one. Just want to know the search perameters for the other year models that will bolt up to the '84. Thanks.