87 Bone Stock Turbo T, Currently bone stock but wanting to mod.

I ran 12.3x with stock down pipe, gutted cat, stock inj, stock appearing fuel reg, stock turbo with port matched inlet bell, untouched IC, stock maf but I removed stock air box and ran a 4" flex duct to a 14" K&N behind grill, port matched the throttle body to intake, Red's 93 street chip. Tuned it using an old OTC2000 scan tool. Ran 20psi but had to run higher base fuel pressure because it would lean out with 20psi. Also ran a sy/ty fuel pump.
A wide band O2 is an awesome addition for tuning and some have an analog needle that dont draw attention like digital. Caspers audible knock detector can be hidden.