How to replace intake bolts?

If you have no leaks leave it as is. I have no idea where you heard a 12 ft lb bolt is a one time use bolt. FSM gives a torque procedure, not a torque to yield procedure. IMO if the bolts are not severely corroded or damaged threads you are wasting your time and $$.

Yea, $2.45 of bolts and less than 10 minutes is much more of a waste of time than taking an hour or more to remove broken bolt. When 8 out of 10 engines we take apart have a bolt broken off, that means something, the factory bolts are junk. They dont have a shoulder on them and most of us know what happens when steel and aluminum play together...without a shoulder, the threads corrode and bolt strength goes out the window.

FYI, Mopar claims they are a one use bolt.