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5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
wellll....according to your signature "94 5.0 mustang couple no mods" you shouldnt worry about a 75mm tb. keep what have right now. spend money where it will make a difference.
75 is way too big for a stock engine, and without modification to the intake it's going to just hit a wall. If you're talking about your '94 65mm is enough.