I haven't seen SKSs with canted sights or gas blocks, if that is what you are concerned about. Some of the early WASR 10 AK clones that Century did, had canted sights and some had canted gas blocks as well. These seem to be a less common problem now.
But again, I've not heard of these being s major problem with SKSs. Probably because they come fully assembled from their original factories.