400 engine

seems like hard to find running engine for sale, if running in a vehicle, they want to sell it complete. i'm looking for a running B B , don't care if B or RB can be a cast crank 440.
I have a friend that bought 4 400's from a guy, been sitting in his shop for several years. he gave $1000 for the four, 1 is complete less carb, others are missing heads, pan etc etc. doesn't know cond. of any of them! unless I find something else, I will probably bit on the complete one and just see what I got.
most people in market for 400 want to stroke it, so all them really want is the block which is not really worth much!!!!