Should I get a complete unit, or one that you just rebuild your stock regulator with? Anyone have any bad experiences?

 

I got mine many moons ago that mods your regulator. Never had any problems with it yet. Don't believe you need one unless you plan on increasing your pressure.

Decreasing your pressure at WOT might get you some gains, however with an OBD11 pcm the changes will only be fleeting since the PCM will adjust the injector pulses to go with the programing.

Pemanent A/F should be accomplished with a tune.JMHO

 

I have a tune but it's still running rich. I need to tune down pressure until I get to a chassis dyno for a good tune.