Brake booster vacume pump.

My brother ran one on his 66 Charger because his cam didn't allow for enough vacuum. He is on this forum so you can ask him. He is notorious for finding cheap ways to do what he wants, so I know he didn't spend a lot of money on it. Send a PM to cu440da. Here's a link to his profile. http://www.forabodiesonly.com/mopar/member.php?u=21039