I would NEVER replace the freeze plugs. I bet you could put it in your car and never have one of them leak. Why would you ever take the time, and money. They didn't leak for 35,*** miles, why would they start now?
I say "bah ha ha ha" to it, and leave those freeze plugs alone. And a year later, if they haven't started leaking, you could give a shout out "hey, I didn't replace them and nothing happened" :D
:thumbsup: