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Simply because you are asking I would say do not do this. This mod is for someone who is fully aware of the problems they may cause and what bore they can get away with after doing this.
Leon
Maybe you could enlighten us all...?
As I understand it, the holes are not there to flow water> They are mainly just steam escape holes. The holes can be very small, and should not effect strength much at all. All low deck R3's I've seen already have this done. The only one's I've seen that don't have the steam holes are tall decks...
Mopar doesn't put any further bore limitations on a tall deck then they do a short deck? 
The reason for the bore limit is because once the holes are drilled, you can't get the max bore out of the block anymore. You need to keep enough metal between the piston and steam jacket so you don't blow thru 
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