Tapco 10 round mags shouldn't be an issue by themselves, at least not federally.
One thing that's confusing about 922r and the SKS magazines is after market US mags claim it counts as 3 compliance parts (Body, floor plate, and follower) but it's actually only replacing two (Body and follower). If the rifle lives in Cali then just leave it original and feed it with stripper clips. Actually that's sound advice regardless. The SKS is what it is and is a great rifle, but it's not an AK and trying to turn it into one with bolt-on parts is generally unsuccessful. If you modify it, don't do anything permanent and keep all the original parts.
I don't collect guns, I accumulate them.