You can have a gunsmith install a chamber adaptor-spacer-thingy, or rebarrel them, so you can use 7.62x39.
They're hellaciously accurate, eject to the left, and have more in common with a G-43 than a SKS.
That said, most got imported from Central America and have rotten bores and crap wood.
If you find a nice one, though, they're oh-so-sweet.