Looking for a pot of gold at the end of a rainbow?

What car/truck did it come off of?
Have you looked for part numbers stamped on the parts?

Try here:
https://www.jalopyjournal.com/forum/threads/hurst-competition-plus-id-help-please.1172773/


"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."