Many were shipped to drag racing teams. As I recall, a ford guy at the Romeo engine plant said there were a little over 2000, but almost 400 of them were internal.
Wow, that was years ago.
I saw two used as part of a coffee table. The comment was "Those are part of my retirement." As I remember, they were complete.
It was 1975. N&S speed on Wordward had two in the back. D. Nickles ( spelled wrong I am sure ) was selling all but the intake and carbs for $1200.
What a trip!