[twobjshelbys]

If you don't run a closed loop system then all you have is a more expensive carb. There are no advantages. You get the advantage of EFI from the closed loop system. The dilemma on a Cobra is that finding an ideal location for the O2 sensor is a compromise. My original one was in the passenger side tail pipe, but at low RPMs there was enough back flow (air coming back) to give a bad reading. We moved it to one of the exhaust ports but then you are only sampling 1 cylinder but it was still much better than the downstream location.

The real advantage for me was what Bob mentioned - altitude compensation is part of the system. A real big deal in Colorado where I also went from 5000' to 11000+ in a 2 hour period.