Hey guys ive got a question regarding carb spacing on the various years of cb750. Im having some problems with the box-o-carbs that came with my basket case project bike for the carboncb project. namely broken parts and of the dozen no matching casting numbers. so the question is does anyone happen to know the spacing of the various years?. im looking at putting later model (1980 ish) carbs on a 1975 sohc stock engine. any ideas or suggestions?