Mark,
Not sure, I got really lucky, I know Brian was surprised I found one, the guy who had it on EBay was a Mopar guy, so just listed the carb number and Super Wildcat and the description was straight from Wikipedia figure it would have gone for much more
I tried to look up the amount of 4 speed Wildcats for 65, yet could not find out a break down, but guessing there were not many
Regards,