"I believe my block was line honed or bored".
Bro - you take good pics which helps analysis. Not surprised of the piston wear versus the bore wear, looks like a little piston slap was going on, more common with forged pistons being a little "loose" if the block was honed/bored and not clearanced correctly (forged pistons expand more than stock cast). And the Valve stem carnage - that is a machining and set-up oversight With bad valve seals, maybe some oil/smoke blow-by was going on?. Not at all trying to throw darts here, just some input based on experience.
You mention maybe going the Stroker route. What else is currently on/in the motor - ie carb, cam, rocker arm type and ratio, valve springs, etc? Was it all stock, or some different stuff when and if it was rebuilt?
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