I have an '81 320i engine, with a 2002 crank. The 320's pistons extend higher than the top of the block with this crank. Are the 2002 pistons different (i.e. shorter)? I assume/hope I can use the 320 connecting rods and the existing head? Can anyone clue me in and supply me with what the parts? I need to finish this engine yesterday!! Thanks, Josh Email: celiack@cs.com