The title on my 88 coupe says 3200#. It now weighs 2285#.
I weighed it one time at the track when I first got it and it weighed in the 3150 range but if I remember right I had the front sway bar off even then.
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88 347, Twisted wedge heads,Comp Cams 224/230 cam, 1/4=10.718 @ 123.02 mph dyno=
http://www.fbody.com/members/LarryS/mustdyno.jpg