OK add some octane (not parts store octane booster) for a tuning cushion and verify you can make clean pulls at low boost. Sometimes flooring it, wheel spin, or crappy roads can induce false knock. If you can maintain WOT with steady fuel pressure 1:1 with boost (43psi base pressure with 10 lbs boost should see 53lbs fuel pressure on the gauge) and zero KR through 3rd gear you should be fine. Verify your chip is matched to your injectors. Then up the boost a pound at a time rolling into it in 3rd on the highway.
I consider a wideband cheap insurance for tuning. I also keep my 3rd gear timing low- on pump gas 18 degrees-even if it costs a few hp. I've only changed one head gasket in 15 years, with half of that time spent between 25-33psi. And I always beat on my car.