used to have a set on my 202 years ago! all i can suggest is that make sure all the carbs r open the same amount at idle and the same amount at wot! bit of an art on its own workn out the linkages, make sure they r squiting the same amount of fuel with the accelarator pumps, play with the idle mixture screws until u get the best idle, make sure they r sealing properly on the manifold and only run low fuel preasure, i think 3 or 4 psi! i was told to run 38mm chokes and cant for the life of me remember the jetting! worst part is trying to get jets for them.