Question about Rat motors

Hopefully a simple one, but I couldn't find an answer on Google.

What is the bore spacing of the big-block Chevy engine?

4.84" :)

Thanks, 1997ss.

Maybe you can shed even more light on the subject. How "big" is a big block? In terms of the block's height, width, and length, how does it compare to a normal SBC? Is there any rule of thumb that makes a block "big"?