Yeah, the car has an interesting past. As far as I know it was driven by one owner in Texas for almost all of those miles then traded against an outstanding debt to a guy here in Montana, where it sat for a few years before making it to me. I wonder if it's worth trying to figure out who installed the cylinder sleeves?

I guess this means it was rebuilt, which would have been good news to me if not for the other thing. . .

Seems unlikely that it would slip down, but maybe the extreme temperatures of me overheating it and a CTE mismatch allowed this to happen? Can't really come up with any other explanation except for the sleeve being way too short in the first place.