I recently purchased this short block to keep for a backup for my Grand National. It has a 14 bolt oil pan and mine is a 20. The computer says it fits 1978-1987. Hoping someone has a use for it. It is a rebuilt block bored .040" over with new pistons, rings and timing chain. The crank was reground with new bearings. The block casting number is 25506397 also D22 GM 4. Cash only. Local Pickup only. I can load it for you. reply here for more information Thanx for reading.