I see the Listeroid spares only advertise an iron piston for a CS6. Ours has an alloy piston, would fitting an iron piston be OK? Would the crankshaft/conrod have to be rebalanced with an iron piston?
The bore looks pretty good with only a lip of about 5 thou or so at the top of the ring movement. I think it's a cast iron bore being part of the cast cylinder.
Bore still has cross hatching visible on the wear area of ring movement.
Is it worth going the hole hog and putting in new mains and seals with big end, piston and rings?
The engine will be used as an occasional charger and support for a solar system with batteries so it probably won't be worked too hard for too long.