Good luck with that, any truck that wasn't destroyed got updated. And by updated I mean back halved and front halved. You'll be lucky to find a foot of frame under them. Your best bet would be looking for a old Walker pre-runner.
Dodge was not a popular vehicle for racing unless your name was Evans or Hall. Not only that, most class 8 Dodges were built by Walker Evans For customers or they would buy his old class 8 when he was building another. Stroppe built a lot of the 4x4 Dodges and many of those were also sold to other competitors after Rod Hall would get a new truck. Dana Dague has an old class 7 D50 that is pretty trick that I believe is for sale. Look him up on Facebook.