I am restoring a 1939 chevy truck 3/4 ton. I have pulled the original 216 out of it and it needs a complete overhaul. I figure it will cost at least a few thousand to get it all done. I also have a 400 small block engine that is sitting in the garage and is in running condition it just needs to be cleaned up. I know it will be cheaper for me to do this but than again I think I would have to change the rear end because its geared so low. I really do appreciate the old 216 engine I took out of it so Just looking at the advantages and disadvantages of each