. But if what he is saying is correct then the lifters bores would've been machined on a CNC rather than cast. So unless the CNC program was defective, the lifter bores should be in the correct location.
The same should apply to original iron factory blocks. While not "CNC" in those days, the machining process would still have been automated enough to ensure a high degree of accuracy. If the machining was "out" on one block, chances are it would have been out on the next fifty or so until a block hit inspection and the problem was discovered/resolved. Even then, there would have been a min/max tolerance - just like oversize lifters or bearings.. I'm still not buying the severity of lifter bore to cam alignment.
