in 1984 this 74 Z28 was parked inside an extra buildings at a dealership, covered up, and forgotten about. Until about 2021

https://www.motortrend.com/features/barn-find-1974-chevy0camaro-z28-found-locked-away-nearly-40-years

https://bangshift.com/general-news/videos/this-barn-find-z28-camaro-is-finally-rinsed-off-checked-out-and-all-the-extra-nos-parts-inventoried