'76 cb360 trouble. again.

Ok. I had the bike running pretty well for a while, it wasn't perfect but I was getting closer. Then it started fouling the right cylinder plug and causing the right side to quit running. I would pull the plug, clean it up and put it back in and all was well for a few miles. I tried adjusting the air mixture screw (after syncing the carbs as best I could) and it didn't seem to make any difference (I know the bike has to be warmed up to make carb adjustments). All the while the left cylinder has been running great, plug looks good and all.

Now a more troublesome issue. I have been trying to figure this out, mostly by trial and error, which means I get the bike running and go for a ride, bring it back and make adjustments. I pulled the carbs and cleaned them, again. Well, it starts right up on both cylinders and I can rev it fine, I pull out and it spits and sputters in first, pulls well in second and then the right cylinder dies. Turn around and limp it back on the left cylinder and when I park it and shut it off, I get real black oil coming out of the header to muffler joint in the right side exhaust! What? I did seal the header to muffler joint as was suggested here when I got the new mufflers, but obviously its not sealed anymore. So I can get it running on both cylinders again without much problem, but then I get a lot of smoke out of the right side because there's all this oil in there.

Now, I'm just assuming its oil that's in the exhaust. I had to add a little oil today but I really haven't been running it that much. I checked the compression again today, 150 psi in the right, 152 in the left. The points are spot on, both sides, as are the valves. I know the compression is right on the line for a top end job, but I'm trying to avoid that if possible.

I honestly don't know where to start. Help.

Thanks
Ben