need help with valve locks

They would actually be 7*. They don't make 10* locks for OEM 4-groove valves that I'm aware of. The single groove valve/lock is typical of performance aftermarket valves. The degree of lock used depends on the retainer, so you have to match thigs up as a set. But if you have the multi-groove valves, get the appropriatly grooved locks which would be 7* and use OEM or aftermarket 7* retainers that fit the spring diameters.