The springs may not be installed correctly. Just because the car ran a good number does not mean the springs are in right. The lower control arm has a pocket that the spring must sit in. If it's not in there the car will sit an inch or so higher in the front.
My car has The Eibach drag kit, no sway bar, and 90/10's on an aluminum headed motor and it sits level. Click below for a nice profile shot.
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1988 Mustang GT
11.8 @ 123 (7/14/01)
1992 BadAzz Wrangler
1993 Explorer
See my car at:
www.mustangworks.com/cgi-bin/moi-display.cgi?179