hey i found the build sheet but some rodents ate most of it so the vin# is gone. once i pulled it out of the back seat i could see something that said "y84 blk spec edit" but the "y" is missing, the little buggers stopped chewing just in time!!!
i was upset to find it didn't have the original engine, would have been a pretty rare find. but i was happy to see that the engine in it is a 78 w72 400, but the prev owner said it was parked because of a rod knocking.
i will probably keep the 400 for a future project.
i don't plan on restoring this car, i bought it as a parts car but now may decide to see if there is any interest in a 79 y84.... with no engine.