The sleeve arrived in yesterday's mail, and it looks pretty promising. It has a wall thickness of just about 1/16", which would require the 235 cylinder to be bored out approximately 3/8" to install it. I'm not sure if that would leave any of the original cylinder walls intact, but I've been successful with similar modifications on engines that get a lot more abuse than the average stovebolt engine. For the cost of one sleeve and a little machining time on an otherwise junk block, it's definitely worth a try. The Ebay vendor's ad says "more than 10 available" so the sleeve is not some kind of exotic, expensive part that's going to disappear any time soon!
Jerry
