Well I built a homebrew o2 clamp and it is working like a charm. I bought two pressure switches and the first one was a dud, but the second worked like a charm... ebay. I am having to revisit the fuel tables since I put my timing back to stock and stuck in FM's ignition table, must be burning more fuel as I got leaner, so I am fatting it up again.
The car runs much better with the 02 clamp. This tuning business is a pain in the ass, but fun.
Chris