It really depends on your comfort level I would think. I am 6'2" and I fit pretty comfortably in my 2003 Cobra Convertable with the top up, but not in an '03 hardtop Cobra. Now, based on interior dimensions I have read the front seats of the new '05 hardtop mustang have slightly more leg and head room then my '03 Cobra vert, so I don't think it would be a problem. However, I do know some 6'-6'3" people who feel uncomfortable in my car in the front seat, so they probibly would feel uncomfortable in the new stang. Your best bet is to go sit an an '03 or '04 convertable and see how you like it, as the sizes are pretty close.