So which is?
Low 12s n/a with that platform won’t be too tough.
With the Auto the 10-bolt will live, a good torque converter and a shift-kit or rebuild if the trans is at all soft, ET Streets on the stock rims, LCAs and maybe a torque arm and you’ll have the drivetrain/susp for low 12s.
Get rid of the opti-junk as Quick suggested, headers and full exhaust, and a good tune and you might get there if you take weight out. Otherwise a cam (and supporting mods) should get it done.
Pretty cheap/simple.
-TJ