You can also use the mustang math on this site for 1/4 ET conversion. Just remember it assumes a lot better traction than what you got.
1) Reaction time does not affect 1/4 ET since ET clock does not start until you leave.
2) 660 ft is an 1/8 mile so the 6.47 sec must be your 330 ft ET. --9.681 sec is the elapsed time at 660 ft.
Plugging your numbers in the analyzer gives 15.1 @ 100.26 mph. Obviously you'd have a lot quicket ET with a better 60 ft time.
I am sure the 60 ft time was less than 2 sec on your 13 sec run.
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'93 GT Conv.
13.35 @ 104.8 mph
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