It's a great car but what needs to be changed out of the box. New wing some guys run the DNX wing I use a JC. You need to drill pistons I went with 4 hole 1.4mm front and rears.
Also flip the rear arms hubs etc so the shocks are facing the rear. Here's a good site
http://lutzinator.com/ he's Durango's best 1/8 driver hands down.
cheers