Hole in Piston Ring

[Ian Williams]

My advice is bite the bullet and do the job properly Graham. Those pistons are not a great design, the modern split skirt or slipper versions with narrow rings work so much better. The Cord rings cause excessive bore wear and sap power. If I were doing the job the block would be skimmed, honed/bored, new pistons, new valves, new guides, head skimmed, tappets refaced and profiled, and that's without looking at the bottom end which will no doubt need some remedial work.