Don T
I overhauled my 126 and 147,one is .020 over and the other is .030. Both are standard oversizes for those engines. Both run great,and I doubt if most people will ever use their Cub Cadets enough that they will ever need another rebuild. Make sure you "mike" the crankshaft to see of it needs turned,both of mine needed turned. There is only one standard undersize, .010. I left the balance gears out of both of them. There is a little more vibration at idle, but at operating speed,especially with the snowblower or mower deck engaged,I can't tell any difference.Check the valve lifters for wear where they contact the valve stems,a machine shop can precision resurface them if needed. I agree on dressing the damaged area,which should take care of that issue. I'm a retired mechanic and think the Kohler engine manual is well written and think a hard copy is nice for those "quick check" situations. Have fun.