No, I don't have a wideband at this time, but it's on my wish list.
Several of us have arrived at the same conclusion. We've gotten there by systematically straightening out everything in the engine -- vacuum leaks, electrical, all of the EFI components checked per the bible, AFM, fuel pressure, injectors refurbed/flowed or new, timing, distributor advance, valve lash and timing (per the 1-2-3 hole positions). And then we still come up short of fuel. We richen the mixture, and then we're fine, give or take.
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Thank you Chickenman! (But no, I don't know the song... And google wasn't much help...)
But tell me a few magic eye tubes wouldn't be part of an awesome vacuum tube ECU -- over the transmission tunnel, under the dash, in a plexiglass enclosure!