Low 11's have been proven. High 10's in my honest opinion are possible.
Rob Crissafulli went 132 in the 1/4 running a class car on an unmodified IC.
Stock turbo fastest number was an 11.37 with a dutt neck on the stocker.
TA49 fastest number is 11.34 with a dutt neck.
I've run an 11.40 with a PT51 on an unmodified IC including having the screen in the scoop.. before happening on a trade for a FM.
HTH