My apologies my forte is with the 6.5 OBDII, but a lot of the 6.2 is common with it; in the 6.5 forum http://www.dieselplace.com/forum/showthread.php?t=53309http://www.dieselplace.com/forum/showthread.php?t=18282 I have started a list of FAQs for many of the most common questions about the pre DMAX era engines, I invite you to visit there if there is a thread within thew 6.2 forum that would make a good FAQ topic shoot me a PM with the link and I'll add it to this FAQ topic for the 6.2.

Thinking about adding a locker here is some info to help decide which one to add
http://www.dieselplace.com/forum/showthread.php?p=432343

Can the 6.2 make power?
http://dieselplace.com/forum/showthread.php?t=137433

Is 6" exhaust system really big enough for the 6.2?
http://dieselplace.com/forum/showpost.php?p=1540202&postcount=6
http://dieselplace.com/forum/showthread.php?t=147364

Which DB2 injection pump do I have?
http://dieselplace.com/forum/showpost.php?p=1731881&postcount=9

Somebody stuck a tuna can on the valve cover - whut's it fer?
http://dieselplace.com/forum/showthread.php?t=11637

What oil do I use, here is a good discussion?
http://www.dieselplace.com/forum/showthread.php?p=481274#post481274

Got Gas in Yer Diesel Tank what to do
http://www.dieselplace.com/forum/showthread.php?t=38729

Photos of 6.2 pieces & parts:
http://www.dieselplace.com/forum/showthread.php?t=79090

Ttt