Are all 351 flex plates balanced the same say 1988 and 1994, and are all ford aod torque converters balanced the same for instance a 1988 aod 351 and a 1992 4.6 aod????

Thanks

 

302/351 flexplates with a 164 tooth ring, 50oz counterweight and 11.5" pattern (AOD) appear to be the same from '81 and on. Earlier models had a lighter counterweight, 28oz. Torque converters are balanced assemblies.