[Jeff Lee]

I'm not sure why it's "officially" approved as you've been able to use any replacement that has OEM specifications (throttle blade / bore diameter, venturi diameter, etc.) for a few years now. It may be a better carb off the shelf for those that don't have the skills to tune an older OEM unit and it's probably better in that I can call Summit or Jegs and not have to find one on Hemmings.com. I assume this carb does in fact meet the OEM specs? Can't see any difference here from the Edelbrock Q-Jets the GM racers have had for years.