A big block with some lightweight parts on it weighs less than a small block and even in stock trim its a couple hundred pounds. Think of it this way, you ever drive your car with a 1/4 tank of gas? A quarter tank in an abody reduces the rear weight by approx. 90 lbs. You're half way to having a big block car weight bias.
Well of course I do! I have a big block inside my small block for crying out loud! I just jumped in here without realizing I was on the big block Forum and do not have one and know nothing about them so I really just wanted to back out. :(