I remember reading in one of the mags years ago that when single-engined planks were being ferried to Hawaii, the a/c would be so heavy with fuel in the long-range tanks that they wouldn't get out of ground effect. It was an approved procedure to fly under the bridge, having taken off from a shoreside airport.
Apparently the FAA didn't really want to let them do that, but it was better than having to launch extreme-range SAR missions when they ditched out of fuel a thousand miles from the coast.