hello, did the 400 ever come with a Forged steel crankshaft from the factory? I had always been under the impression that they were all cast( at least the dozen or so I have disassembled) but saw in some book today that showed a parts listing claiming a steel crank.so, did they? and another question, I need a external balance damper for a 383 cast crank, I have a external damper from a external balance 400/440, will it work on the 383? Thanks