A QUICK QUESTION ABOUT MANIFOLD VACUUM

CFD244 said
Well, I cleaned the hell out of it and blew out all of the passages and installed a new kit and adjusted it to the OE specs. It actually looked really good when I first received it. It was a late 70's take off from a Barracuda and then shelved. No evidence of dried fuel or varnish. LOL...It was delivered in a '70's Holley box so I can imagine the story.

BTW....Pardon my ignorance, but what does IFR stand for?

Idle Feed Restriction. If you pull the top off and turn it upside down you'll see where the the fuel travels up at an angle towards the booster outlet. Inside there is a little pressed in tube that should measure 31 thou from memory.