Just a quick heads-up on this car...
After several failed attempts on Ebay, the owner is now shopping this car around as a "matching numbers" COPO Chevelle, complete with original KQ rear, and possibly a new trim tag...according to those looking at the car last year, it was a 396 car with a KK rear with a '70 454 in it and an 11D build date. There's a LOT more to this story than I care to get into, but if you're bored, here's some more info:
Team Chevelle thread 1 -
Team Chevelle Thread 2