<VV> pulley question

[judynrandy at comcast.net]

What Corvair engine did this pulley come from?   It is a cast iron pulley with 3 spokes coming out from the center, spaced equally apart.  At the center there is an egg shaped  pad around the center hole with two bolt holes on the pad, at opposite sides of the center hole.  It is residing on a '64 convert with a 95 hp engine in it.  My guess is it is a smog pulley.  If so, what should the correct pulley for a '64 95 hp engine look like?  (The owner of said car wants to know.)  Thanx. 
  
Randy (Cap'n) Hook 
'60 700  4dr '64' 110/4spd 
'63 '500' ragtop 110/pg 
'65 Monza 4dr 84/pg