<VV> Pulley...

[Secular]

  There are two fan pulleys used on corvairs :)
  1960-64 & 1965-69 !

  What is the difference between these pulleys? 
  Could they be interchanged? 

  I know they are quite inexpensive (used ones are less 
  than 5 dollars). 

  I'm not trying to swap or experiment. I'm trying to find out
  whether the wrong one is on my 1960, causing the belt to 
  vibrate (vertically) between the fan pulley and the generator. 

  Cleaning both pulleys has not resulted in a remedy. Neither 
  has replacing the generator !

  Regards,


  Tony I.