My 5.9 into '68 Dart swap

Ok, Big Trouble in 5.9 land.

Got this thing cleaned up a little better and got some better light on the cylinders.
Found some very strange looking stains, or wear marks on cylinders 6 and 8. I'll post pics so you can see. The marks are completely smooth, you cant feel it with your fingers.

Also cylinder 4 looks like a small pebble or piece of metal or something made its way through the cylinder at some point, there is a small dent in the edge of the piston, and a corresponding light scratch on the cylinder wall, but right next to it is a much worse scratch that you can easily catch you fingernail on.

Any idea whats with the weird marks in 6 and 8? Never seen anything like it.
Could this be honed out? or am I looking at a bore job and pistons.
Another option is, the guy I bought it from said if I get into it and its junk, he would make it right. Not sure if that means he'd take it back, or what.

First two pics are cylinders 6 and 8, the last two are the scratch in cylinder #4

cylinder#6.jpg

cylinder#8-1.jpg

cylinder#4-1.jpg

cylinder#4-2.jpg