Can you safely shoot a 45LC in a smooth bore 410 shotgun with a full choke?

Absolutely not. A .45 Long Colt bullet is nominally .455 inches in diameter. A .410 is .41 caliber. The cartridge will fit because of the extra chamber diameter to accommodate the thick body of the shotgun shell, but attempting to fire a revolver cartridge will result in overpressure, a burst barrel, and likely injury.

The chamber pressure of a .45 LC is higher than a shotgun is designed to tolerate, to begin with.