When we pulled the engine/transmission on my wife's car; for a rebuilding, we pushed it into an empty corner of a building my family owned.
I took my time rebuilding the engine; had a friend rebuild the transmission. Just in the time it took to rebuild those, the under side of
her Camaro was home to many spider webs, dust etc, that we had to clean off before reinstalling the engine/transmission.
Its always amazing to see a car labeled "barn find"; when the car looks really good.