Depends on what a project challenger costs and the level of parts replacement necessary to make it nice again. Also I suspect it would be faster to build a car from a clean body vs one that needed most of it replaced. You would need to scrounge up all the inner door hardware, dash, pedals, heater box and all the essentials via parts cars or junkyarding.

I see the repo bodies as perfect for hot rods and pro touring builds. Using a new body to "recreate" a long dead 440-6 or Hemi car would be a lame move.