I am not using a power plate. My car is mostly stock with simple bolt-ons. All I want to do is tune it to it's potential as-is. If you want to know the history on this car, I'm the second owner, PO did more work to the radio than he did on this motor. I got it with the original power master (which failed and now I converted to vacuum), the original turbo (reman) is still in it and has a 3" downpipe, going out to magnaflows, 42lb injectors, applied tech cold air kit, TT chip (v5.6 at 16-18 psi, and 20/18 timing) and a hotwire kit for the pump. Car runs great; but in boost (at about 17psi) it knocks (3 degree rt). What I know now is to decrease boost, increase octane, and check fuel pressure in boost (1:1) at this point. I will do all three and report back. I think I'm just in a tuning scenario and just have to dial her in. Which seems common in these TRs.
Thanks for all the replies and help. Really appreciate it.