You spent $5k on an a/f hookup??? I hope it is the A/F sniffer hookup that attaches to the Dynojet AWD dyno. We actually paid $6k for ours but I'm sure it is the same thing.
The reason I am hesitant is because I work with duty cycles and "hp/lb per hour" on injectors every day and am very aware of how what injector can handle what horsepower and I don't want to see you destroy an awesome engine. My EGT's were showing fine and my spark plugs looked awesome and guess what? This is what my piston looked like after it blew up! Even with what I thought was plently of injector!
I'm not trying to start a flame war. I'm just giving my opinion of what happens when you starting running lean regardless of what gauges tell you! I work with engines that create a lot of hp/liter every day and know what can happen!
Eric