OK, I finally got around to finishing this engine restoration project.
The wire wheel cleaner took care of the corrosion although not as well as I had hoped. I tried bead blasting it to get a more even color/texture on the casting, but the beads we had in our blaster at work were a little course and I wasn't happy with the result. So in the end I just used steel wool and good ole fashioned elbow grease! It took several hours of rubbing, but I think the results are very acceptable and this engine should work out just fine for the Kwik Fli MK III. It has very good compression!
One thing I didn't get with the engine is the carburetor instruction sheet. There is no model number on the carb, just the O.S. logo. Does anyone happen to have a copy of the instructions they can post?
RG