351 flywheel question
 

I have a '95 5.8 going in a 89 Mustang LX with a T5. The LX already had an older 5.8 in it. Not sure if flywheel & balancer are right. What flywheel, clutch, & starter do I need. Does the starter matter between 157 or 164 teeth flywheels? The flywheel that came off has 157teeth on it, so it must have been a 10.5" clutch, but when I call for parts they list the 11" clutch. I know I need a 28oz flywheel. The flywheel that came off has part #RF-E1ZR6380-A2A & I can't find any info as to what it came from originally. Is it 28oz or 50oz? I'm confuzed. I will be buying parts from E-Bay, & living in Canada most of it is from the States so I don't want to buy the wrong parts.