Yes, the engine can go 0.060" over. However, that kind of cuts things a little thin and makes this, "the last hooraah" for the block. If it ever needs another rebuild, it will have to be sleeved or honed very lightly if in good enough condition.
Also, check to see how deep the scratches are, they may hone out if the piston will still have 0.0035" clearance or less with the cylinder, however, I would not use on that way. I keep my tolerances to 0.001" or less in bore measurement from the size of overbore I want to use as much as possible. My engines are usually impossible to turn by hand and difficult to turn with a 1/2" breaker. They run very well and break in very quickly, but it is H#$% on the starter.
Edited by: 1976Scottsdale at: 9/11/06 9:47 pm