If you have a 3fe Block can you put a 2f head on it and make it a 3f ish? I kinda want to buy another engine block to rebuild as a project/back up engine. ANd honestly to keep me busy. The 3fe blocks seem to be cheep. Its kinda the opposite of what people seem to do though. This is more of a curiosity I guess Not looking to why or why nots just can it be done and it run?