I had a 2004. 5 (600) truck long bed, auto with 373 rears. I towed an 10K 5th wheel for a few years. Now Monday (in my 2010 auto 373 gears) I'm heading to Vermont to pick up my new 5th wheel that weighs very close to the old 5th wheel. I'm just wondering how the stocks trucks match up. My 04. 5 really did great when I added the smarty JR, banks exhaust, afe intake. I have an afe drop in now but probably won't go much farther with the mods. I really like the features of the 2010 just wonder about the power and new trans stacking up with my stock 04. 5. So how about it?