Normally I would say the 600 also, but some will depend on how they do your emission testing. Here they do the idle and at different RPM ranges plus the ever present visual test. If you have the wrong carb on, no matter if it passes the sniffer test they will fail it. And the visual includes replicas. I know of one person who registered his by the year of the engine as he couldn't get a SB-100 number and it passed the sniffer but he had the wrong air cleaner on so they failed it. All in the interest of money as a chrome air cleaner won't pollute any more than a painted one. But they got to charge him another $100 for having to put the painted one on and go to the referee.
Ron
