Whew, I didn't mess with those because that gets into some tools and commitment I was not prepared for. Nor did I need them: although the truck's clock reads 234,500 miles, the compression's fine, doesn't smoke since I replaced valve seals.

I haven't fooled around with ridge reamers and ring compressers since high school. And all that micrometer stuff.

Do you have cross hatching on your cylinder walls? Probably a bit, and if the carbon ridge isn't much, I wouldn't worry about rings for now.

You might want to re-read my previous post, as I edited it.