faucet set in deep well

Scenario: bathroom vanity sink from 50's. Trying to remove faucet. Cannot access or remove the nut that secures the faucet against the porcelin from underneath. Basin wrench can't turn because the "well" is so narrow. Copper connections from faucet spout to hot/cold turnoffs make it like one piece. How did they ever get it in there and is there no way to get it out? I have progressed to the point where the hot/cold valves and connections would just drop out underneath IF they could be disconnected from the faucet part but then I would still face the problem of lossening the nut that secures the faucet. The faucet can't be budged from the top....ack

Linda

Wear a heavy work glove and use a hacksaw blade to cut the nut under the sink by hand. Once cut, tap it off with a hammer and chisel or large flathead screwdriver to remove it.
Good Luck!
Mike