Engine is apart and block halves ready to ship to L&N.
#4 piston. Skirt has totally lost its coating, hence the scoring
#4 cylinder with all the scratching.
#6 cyl (far left) is fine as are the 4 other cyls. #6 is where scoring usually happens, but not uncommon for #4.
#3 piston. Skirt coating is starting to flake off. Bad set of pistons from last rebuild?
