Most likely this has been discussed, but in a senior moment, I'll ask again. I am trying to find and sort through a matching pair of decent camshafts to send to Swaintech for coating and I am have become confused by the factory markings. I have some simply labeled "In & Ex" , others, "In-1" and " Ex- 2" and 1pair with nothing at all! Were there ever an Ex-1 or IN-2 ever produced by the factory? I am also searching for the elusive intake sprocket marked "A" for comparison to the Standard... I had a service bulletin on this at some point but seem to have temporarily misplaced it... Geesh! Any info appreciated. I know Hitch' has 3 grinds available. Has anyone tried them on this forum?