Seen plenty of short blocks sat for years and would end up as bolt storage , each cyl filled with bolts... but often someone pushed out piston with a long pry bar and would miss and hit the bore.. doh
I wish all they were was from bolt storage or marks from a prybar...I need to take a couple pics of them. The marks are only at the top of the bore, where you'd normally get carbon buildup above the rings. The engine had a ridge, but I honestly figured it would clean up at 030...till the machinist called me and said it looked like someone had used a ridge reamer or something and the bore he attempted to take to 030 didn't clean up. When I looked a little closer, they're radial gouges like someone tried to plunge the rotating cutter into the bore without properly setting up the bit depth.
