2002 12.7 60 series swap/rebuild question

I've got a 03 columbia with a 430/470 60 series with about a million miles on her. Never been touched. I bought it 2 years ago and run it in the oilfield, needless to say 430 even with 4:30 gears is just underpowered in the mud pulling 100000lbs. I didn't dare do any ecm tunes or anything on it with a million on it, that would be suicide.

This #### thing just won't die and runs so good and strong it's utterly ama zing but my question is for when it finally does bite the bullet.

I've been told 2 different things by 2 different detroit guys. One said when I do a rebuild I can just buy the 500 kit and I'm good to go (bigger injectors, turbo etc) but another guy said you can't do that...... so any thoughts on that?

Next question. If I were to buy a junk yard special 500 with ecm, are the wiring and plugs similar? I sure love me my junkyards.

 

I had a detroit dealer hook to my ecm and they said 430 is my max and also the injectors and turbo is different.

 

Sorry. I should change that lie...... I had a Freightliner dealer hook up.