273 piston ring nightmare!

Dealing with .060 in a 273 can be a problem, (cylinder cracking) of course that bore is a done deal on your engine. My service manual says .010 to .047 on the compression rings and .015 to .062 on the oil rings. It also says that rings are available .005, .020 and .040, it doesn't mention .060, but that doesn't mean that they are not available. I know that 273s have been bored that far, so there should be rings out there, but I also know that after one is bored that far it should be ultrasonic checked. I asked about doing this some time ago. This is the thread. 273 Boring