I have a Yugo SKS in the original stock. The results from bedding the action and the stock have been well worth the effort.
First, I bedded a 1" area directly in front of the magazine. After applying release agent and modeling clay liberally in front of the mag, I reassembled the rifle and poured acra glas (the thin kind) directly in two small gaps between the barrel and the stock directly in front of the step in the barrel. These gaps are original to the gun and I did not enlarge them. I also put clay in the stock about one inch in front of the mag cutout to keep the epoxy from flowing down the barrel channel. With the rifle right-side up and horizontal, I poured in epoxy and let gravity do its work. Make sure you don't get any epoxy near the front hinge of the mag.
Next, I bedded another point at the front of the rifle. I inletted a spot at the front of the cleaning rod channel to allow for a 10-32 rod coupler. I put a 10-32 screw in the back of the coupler and blocked the cleaning rod slot and the front of the rod coupler with clay. Then I filled behind and on top of the rod coupler with acraglass gel, then reassembled the rifle. You could put up-pressure on the barrel at this point in time, but I just used neutral pressure. I lost use of the cleaning rod slot, but I gained an anchor for my 10-32 sling swivel stud. I wanted to be able to remove the stud easily whenever I clean the rifle. I did not bed the tang area as my rifle is a very tight fit as is.
Before I started I did a search to find out how to bed an sks and I came up with nothing except discouraging words like 'don't bother' or 'the sks will never shoot.' All I can say is bedding my Yugo made the most difference of all the items I tried to help end up with an accurate rifle. Don't get me wrong, the Tech-sights, Tom's trigger job, and handloads, all contributed, but bedding is the best!
Good luck and have faith,