I picked up a 261 block that was already bored .060" over. The problem is the genius who did it, didn't fit the bore to pistons. The only pistons available (that I know of) are slightly smaller then .060" leaving me with .002 clearance. So now I have to go to the next size up which is .080" over. Is this a safe overbore? The block is a 59. I talked to Patricks in AZ and they said the .080 over is pushing it and on top of that the .080 pistons are very difficult to get. Two sets now on back order for about 6 months. How much piston to wall clearance is acceptable? I would think the .002 is too much.
