Block out of square

So, hypothetically...... the machine shop screws up the line bore to the tune of .32*(so the result is the .046” out of square condition at the bell housing mounting flange).
(Keep in mind, when performing the line boring operation, and screwing it up to this degree, on one end of the block you’d be cutting nearly an 1/8” out of one side of the main bore........ and zero on the other. So now the main bore is like .125” out of round...... how do we fix that before continuing on to the next step?
Oh btw....... if we’re not installing aftermarket caps with a way undersized bore, and just truing up the main bore using the existing caps, we’re expecting to only be making like a .005” deep cut........ not .125”.)

The normal way to go about it is, main bore first, then deck the block.

You have your freshly line bored block that’s now off .32*...... you mount it on your surfacing machine with the centering rings and check it end for end.
The deck surface is 19” long....... which would now require .106”(.067 in/ft x 1.583ft) being removed from one end of the deck to get it parallel to the main line.

Does this really seem like a plausible scenario?