Summer 1986, I had a Camaro with the ubiquitous Holley 600. I was getting ready to go somewhere and the car wouldn't start. I pulled the air filter and saw fuel dripping down onto the throttle blades. This was the FIRST time I heard about sticking/stuck needle valves. Now they come in many rebuild kits. That car didn't have an inline fuel filter before the drip, but it did afterwards.