If the lifter bores aren't in the correct location then that is the fault of whoever designed the machining process. Everything that is performed in the same setup should be very precisely located. The problem is that most of the folks who have made Mopar blocks over the past 20 years haven't taken the time to do the machine setup correctly. They move the block from machine to machine and lose the reference points in the process.

All you have to do is walk thru a shop and you can tell in a few minutes if the block is going to be accurate or not. If workers are moving the blocks from machine to machine then it won't be accurate. If the block is bolted to a tombstone and is in a giant VMC or horizontal and all operations are done in the same setup then it will be dead nuts on unless someone screws up the programming or loads the wrong tool into the machine.

I never visited the old KB mfg site but I talked to a person who was familiar with it and he said it was basically a blacksmith shop. The old KB hadn't stepped up to modern equipment and they were moving blocks from machine to machine and doing hand operations. So of course the lifter bores were out of whack and the cam bearings weren't aligned and all of that kind of stuff. If you don't have the right tool you can't do the job correctly........