Toyota Landcruiser 1980 BJ40. Seized Engine.

Here is my garage kept 1980 BJ40. Imported from Portugal no rot or rust. The engine iscompletely locked up.I have no idea what happened, this WAS a solid running BJ40 for the three years I owned, after driving it all day I shut it down, an hour later, started it up, it idled a bit rough then just stopped. End of story. This BJ40 is complete, minus the engine... every light works as does the heater fan, wipers and even the windshield fluid sprayer. I even have the inspection lamp.The driver window needs a regulator, as you need to "help"it up to the half way point, then it rolls up.

No battery.
Three months prior to the engine seizing up the following work was done:
Toyota power steering upgrade.New aluminum radiator.New Procar elite recliner driver seat.New Spare tire.Tires put on new and have no more than 1000 miles.Starter rebuilt. Not installed.
Included:3 fuel filters.3 Oil filters.8 New in box glow plugs.