So I thought it was running rich and causing a stumble at wot (.69-.72 afr reading).. very annoying, couldn't get it clean up. So I decided to go the other direction.. add more jet to primary and viola weird wot stutter is almost gone. Test n tunes are great.
When it was misfiring it was reading a rich condition.
Also any ideas on a better China rail seal on the intake? Mine has now blown out after 5 full 1/4 passes. Made a helluva mess.