vacuum leak at the top of the car just a few inches behind where the air filter stud is.carb is a 4 barrel rochester.does anybody now what that hole goes to?
If I am correct in asumeing your talking about the large port that is at the back of the carb,at the base, then one line runs to the power brake booster, and as on mine there's a tee withe a 1/4 inch line that runs to the modulator on the transmission.
Is it next to the air filter housing ring? If yes, it's not a vacuum leak, it's part of the carb., there is another one toward the secondary rod hanger too.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
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