Mark here from central Tx area near Waco area.
I have a stock 2005 Duramax GMC ext. can long bed 2wd with 320,000 on it as my work / daily driver I love.
I recently acquired a 2007 5.9 SBQC 4x4 Dodge. It has following mods I can think of off the top of my head.
Dual CP3 pumps
Fass 200
ARP 625...