Stock turbo should be good for very low 12's if not high 11's.
I went 12.20's with a lousy 1.8 60ft with stock injectors. Since I went 11.53 @ 118 with 36# injectors (and a TA49), I'm pretty sure these won't be what is holding you back.
When I sold my 87 GN 7 years ago the new owner ran 12.3/110 with a stock turbo(P&P by Conley)36lb inj,3 inch DP and exhaust on slicks. I had run 12.34/114 on the same car but with street tires and TE32 turbo with stock DP.