That mph is good. 102mph will take you into the low 13's on slicks if you hook very well.
I ran 13.2@105.8 with lowering springs.
I went with drag suspension.
12.55@106.9mph now.
You should shift at 5500-5600 though, You'll probably pick up about .7mph more.
SKyler
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-1989 Saleen Mustang #406- TFS Heads, E-303, edelbrock intake,70MM TB, 73mm MAF, off road H, headers and 3chamber flows.
12.55@107mph
Runs on 87 Octane and gets 24mpg!