Holley Efi or Gm Performance parts

[snappytravis]

Just curious what you guys are running for engine management, I have 416 ls3 in 69 camaro and will be close to doing some wiring in the next few months I need pretty much everything. Car body, interior, headlights, taillights. I would imagine American Auto Wire. I however am confused on the engine. I see you can purchase the gm setup with pedal, o2 sensors and harness for around 1100.00. It would have to be tuned. I also was looking at the holley setup that is self tuning. What are the pros and cons of these two setups? Thanks