340 and 360 Ductile Iron 4 Bolt Main Cap Sets - New

No issue with the small amount of overhang. They are only wider for a small portion of the outer end of the cap after the register. My machinist has done this many times. He cut off the outer bolt hole as the stock webbing is not thick enough to use the outer bolts. Aftermarket blocks or a TA block have the main webbing meat to use the outer bolt holes.
See picture in add how we installed the middle 3 caps on my 340 Block. I did not have the front cap when I did my build so I used the original number 1 cap. The remaining two bolt caps you see in the picture are much stronger than the stock caps.