I did a 12.3 in a full weight 25/30 GTST 5 spd, 350 killerwasps, GTR diff, 245/45 17 Dunlop Direzzas, Bilsteins and kings, I had about 30 goes at trying to better it at the SAUNSW drag day, terminal speed was 123 mph, 60 foot was 2.? seconds which was crap but the tyres just kept bagging up, if you got some good drag radials and stock shockers you will most likely get a better 60 ft time, BUT, in all honesty, you may be dreaming.
10.99 is along way away from 12.3, Im hoping for 11.9 next time but I will be using drag radials.