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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.
I put new heads on with 202 valves (larger than stock) and the car seems to be running a bit sluggish. I jetted the car from 67 to 69 and it is much worse. Should I be going down?