This info came from a S2 forum member:
7A: intake: 9,6mm exhaust: 10,5mm intake: 224 degree and exhaust: 213 degree
ABY,AAN,3B: intake: 8.3mm exhaust: 8.6mm
ADU: intake: 8.3mm exhaust: 9.5mm
The S2 forum’s long 7A cam discussion is at the URL below.