Strange looking wear on my 5.9 cylinders

Please take a look, this is the 5.9 I bought to put into my Dart.

I found two very strange looking stains, or wear marks inside cylinders 6 and 8. Plus on cyl #4 there is a dent in the edge of the piston and a corresponding scratch in the cyl. Obvious something made its way through that cyl. The longer scratch isn't bad, the shorter 1 inch or so scratch is pretty deep.

Look at the pics and let me know if you've ever seen anything like the stains, or if you what might have caused them. Was hoping to just hone and rering this thing, don't have the cash to bore it and buy pistons and spend a bunch of money at the machine shop.

cylinder#6.jpg

cylinder#8.jpg

cylinder#4-1.jpg

cylinder#4-2.jpg