My experience with the local wrecking yards is in reference to the 2003-2008 5.7s since I'm looking for a direct replacement for my 2007 engine.
2006-2008 5.7s with MDS are in the $2200-2500 range, car or truck.
Oddly, I've read that the car engines made slightly less HP but about 15 lbs more torque. That surprised me. I would have expected the truck engines to be biased toward more torque than the cars.