Adrie's analysis on the previous page has to be correct. Even if the holes did balance the small base circle twin lobe cam then no way would they balance the F cam or the A6/664. So why on earth do it? And why on some cams but not others?
36 4G, 37 VH, 54 KH(A), 75 Healey 1000/4, 52/53 ex ISDT KHA (project).
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist once more - but not Machine Registrar.