Parts for the 3500 and 2500 are the same....Your just adding extra weight if you go DRW 3500...What little that is different only hurts ride quality.

Me, I have had both, and I love my 03 2500...Best ride, best handling, best towing to date...Driven newer ones, mine seems faster, gets 18mpg and has been great...

At te cost of $2500 to deleting the newer ones....I am avoiding those at the moment. I see the mileage is only 12mpg on the newer ones...Ain't going there...

'70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk