well put it this way, it was your first time at the drags so it was all a learning experience for you.
Now your 60ft time isnt the best, so, like benm said if you can launch right and get it around 2sec then you should really be looking at 0.5-0.6sec faster after the qaurter. So that would be 14 flat. Then you really have to concentrate on getting the changes right and needing two grabs at a gear doesnt help.
Ask around here to ppl such as 2rismo and co for tips on tyres, launch rpms etc and then get a few more runs under the belt becuase with your mods you should be in the 13 second bracket. Good luck with it all.