Cusser
+1y
It's common for the B2000 and B2200 engines to smoke as they approach 150K miles. Typically the valve stem seals go, but also the piston oil control ring (lowest ring) seems to lose its expansion qualities or gets stuck in the piston groove, so it smokes.
The real fix is to re-do the rings and the cylinder head. On my '88, I went with new pistons, and added new connecting rod bearings while I was in there. That was Oct. 2011, and I drive mine every day.
I estimate at least 98% of the smoking is gone. Before the rebuild, I would remove the spark plugs once each month and clean them using a drill/wire wheel attachment. I've looked at the spark plugs now, and haven't had to clean them at all in 1.5 years, they look good.
I spent $700 out of pocket to do mine, did it with the engine remaining in the truck (I did not do main bearings, my connecting rod bearings and crank journals looked like day one). I did replace the little coolant hoses too while I was in there, machine shop did the cylinder head.