Sct reading knocks, lean condition, random misfire

[Mach1Junkie]

I have a super rich tuned built and blown mach. The tuner that did the car said that I am getting these codes because I'm running so rich and not to worry about them. I trust this guy about half as far as I can throw him. First do I need to worry, second what parts should I swap to try and fix the problem ? Plugs, wires, stuff like that? This guy put 100lb injectors in a car I.wanted max 600whp then tried to tune it with stock maf and blew the motor he "built" on the dyno (this guy went through three motors) I could go on and on about the incompetence of BPR (long island shop, do.not go there unless you want to pay somebody to screw up your mach). But point is I trust your opinions much more than the idiot I dealt with. Any input would be appreciated.