So why is the first thing that everyone wants to do is bore the block??? Does having a couple extra cubes mean that much? Obviously if I am running a heads up, must meet these rules, class that is one thing; but, why on a bracket or street car??? I would think you would want your cylinder walls as thick as possible. You hear engine builders all the time worried about distortion and deflection. If the 5.7 is that much thicker then my mind is made up cause I only want to make 650 horse anyway. Stroker 5.7 = 392 and good heads sounds like its no issue to get there from all that I have seen on here and talking to several people.