There's a black DP Challenger on RacingJunk.com for $48K. Has the development mule 392 Hemi engine.
Since the original post said "CJ or DP", my un-educated opinion on the subject is why would anybody race the Challenger if the CJ was an option?
Looks like there's a lot less time, money and *** ache in the CJ as a project.
But then again, I have an AMC race car...