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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.
Update: got the car back from the tuner yesterday. He stuck it on the dyno after setting up the computer and its best pass made 255hp and 321tq. I was a little dis satisfied with the hp but he also said that its a loaded dyno and if it was on a dynojet it would show numbers 20% higher which would be 306hp and 385tq. The tq seems a little on the high side to me and hp seems about right for a dynojet what do you guys think?
E303 and GT40 isnt gonna throw you over 300. Your setup might hit 270 on a dynojet but thats about it, torque will be in the same area, low 300s. take it to the track.