Let's not overlook the best thing Josh has shown here....Got the throttle body off. Got a bit more light into rear cylinder through the valves and managed a clearer image of the piston.
I've never dealt with cylinder and valve issues before, so my experience with these is issues are limited to research.
View attachment 58534
View attachment 58536
View attachment 58538
If you are buying ANY vehicle get a scope and bring it to the sale...