Still fighting with this set up. I changed the intake gasket because I think it had vacuum leaks, pulled the carbs and tightened all the screws because they were all lose and leaking gas,It is starting to run better but cant seem to get the idle screws in the center carb to do any thing. in all the way or all the way out and they seem to make no difference in the way it runs. I did notice that the front and back carbs have small holes drilled in the butterflies and was wondering if that is the way they are? Anyone have any ideas. Thanks