78 Aspen engine(318)/transmission (904)

It's a 318 out of a 78 Aspen and a 904 transmission.

How long has it been sitting.

Did you check a database, or are you just that knowledgeable? Thank you for the info.

Step dad wrecked the car (his grandma's Sunday driver) in early 90s. Car Sat under barn for 20 years. Engine removed and saved, in barn, when car was scrapped (around 2004).