found this video interesting.. 360 dyno testing.

Icetech said

well they also shouldn't call a .030 over 360 a 360 :)
This one had a bad day...

Click to expand...

A normal over .020-.060" isn't big deal could say either, now if you bore a 318 into a 340 and act like it's a miracle that your 318 is acting like a 340 is a little different.