Red Headed Stepchild-75 Swinger LSX Swap
I have a guy local that's been tuning my cars for me for the last 8 years or so. He can do any thing from slightly over stock to twin turbo 1200hp monsters. So he doesn't gouge me on price. I was also looking at the option Dave mentioned above, as well as the more basic micro squirt setup for $395 that id have ti finsih wiring myself.
there is also this lit feom FITECH
Ultimate LS Standalone ECU – w/o Trans Control – FiTech Fuel Injection
so many options to choose from, it all really depends on budget and options you want it to have.