I received my 261 .080 over pistons yesterday thanks to Inliner Troy Robertson. In his search for them he bought out the NOS of a shop in NC. They are Knowler (sp) and the machine shop said they looked older than me, whatever that means. Acutully I think I have a couple of years on them.
Anyhow, the box say's they are tin coated, anyone know why they did this?