Everything is possible given enough stubbornness and lots of money but I would avoid doing so.
The SKS is so available that finding a trade with someone's Model D is easier and a whole lot cheaper.
Besides, what is the point of converting what was designed from ground up as a very rugged and dependable lttle carbine into an AK ersatz with no hold-open device?
And having to lug those long 30/5 round magazines is a pain in the butt, too. Their one and only quality is to give you enough grasp and leverage for insertion into the mag well, a very difficult task with 5 round cut-down magazines.
You guessed it: I'm not a big fan of the Model D.
PP.