The AMG isn't a "big block". Even at 6.3L, it's not. It's a "small block" that's bored out. The C6 Z06's that had 7.0L v8's were not even big blocks. They were small blocks that were bored out and sleeved despite that being the exact same displacement as the 67 vette's 427 cubic inch big block engine.

http://en.wikipedia.org/wiki/General_Motors_small-block_engine#7.0_L

AFAIK, there are no big block production cars anymore because of weight/fuel efficiency and the fact that they have the technology to bore out small blocks to big block displacement. I'm pretty sure the whole big block / small block thing died in the mid 70's due to the fuel crisis.

Gonna get the Chevelle out this afternoon (after I fix the lights that burned out in the garage) so maybe I'll take a video and post it tonight. Here's a preview.

LoD black and blue.