ALL A series cams from the 1974 & later design revision are directly interchangeable with each other, although the 'cam event' specs will vary from model to model. These are the 'rear positioned' distributor engines.

All 1974 & later A series cams can be used in the earlier A10 & 1200 engines if you abandon the original fuel pump & fit a blanking-off plate. [Front positioned distributor engines]

The earlier A10 & 1200 cams are not really useable in the 1974 & later engines as there is no gear to drive the rear positioned distributor on these cams.