Engine

The engine was not preserved prior to storage.

Given this situation, the engine will be getting an entire rebuild.

It is unlikely the cylinders can be economically salvaged.

Given the expected condition of the completed airplane, new cylinders and accessories are very likely.

Despite the appearance, the airplane was stored in hangar its entire life. It was a freezable building so the engine was subject to condensation.

Many new parts are anticipated.

Though the engine may be the singlemost expensive task of the update, it does not detract that everything else is expensive as well.