Block out of square

Being a machinist I would think that the factory, or any company making engine blocks, would have fixtures that held the blocks in the exact correct orientation for each machining process, there's no other way to mass produce factory engine blocks. If one block was off .040" on the back face they should all be off (which doesn't make any sense). Also, "Wenger" wrote that the block had been align bored and that is where things could have gone wrong (depending on the machine shop). It might run fine just the way it is, there's no way to know unless he completes the project and puts many miles on the drive train. I'm surprised that no one has checked their block (in the last few days) to verify how square a regular block should be. I have one I might be able to check......I bet it's square!!! Lastly, I wonder how much end play there is in the crank. If the crank in walking front to back as Wenger is checking for square it might make a difference in the reading??? treblig