My '90GT (hatchback) ran 14.53@94+ the first time I ran it. I had a K&N filter and March street pullies, but it was pretty stock right down to the spare & jack in back. I think I was up around 3555# at that event. The droptop will be slower with its extra weight (everything else remaining the same). I was running on my stock Goodyear VR Gatorbacks when I ran those times. We were able to drop the ET a little by going to some Sportsman Pro tires.
Hope this helps.
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Jeff Chambers
Trophy Stock #3
11.97 Seconds / 114.5 MPH
Chambers Racing Team