Are there some machinists out there who can help with a 440 balancing question? I am re-building a blown 440 for a friend. It was originally a std bore, stock .010"/.010" forged crank with TRW pistons and stock rods. We changed to Eagle H-beam rods and SRP (JE) pistons. I am working with a machine shop who builds racing engines - this is the first time I have had them do any work for me and he is telling me that the crank is modified and he can't balance it. He says that "the counterweights have been machined and that someone has cut grooves in the counterweights". He told me that "he has to take 200 grams out of the crank which is almost impossible". Look at any 440 crank and the rear counterweights are machined on outside diameter and the grooves that he is talking about are also in all 440 cranks. How do I respond to him? Thanks