You can be rest assured that all is well if Barry Robotnic did the rebuild. He would have never built the engine without a sonic check with adequate thickness. I wouldn't worry about anything except being sure your cooling system is up to par. 160 is too cool. Don't run under 180. It causes excessive wear. Keep in mind that too cool will wear an engine out. A radiator core in proper repair, fan clutch, quality water pump impeller and fan shroud helps tremedously. If you're not planning on certain judged classes I would go with an edelbrock water pump. I would run distilled water and water wetter, not coolant as well. If you're in a climate that freezes,you have little choice but to use antifreeze.
-Keith