Mine is currently in the car, so that is out of the question. And in having more nickle in the block, it makes the metal stronger. Therefore allowing the use of LESS metal to contruct the block and heads. If you look at them side by side, a Buick vs lets say a Chevy, the buick mains and main webbing are physically and visually smaller than that of a SBC. Also, buick never made a four bolt main block. Why? Because stock for stock, the blocks and bottom ends are stronger. Why? More nickel. Chevys made four bolt mains because their bottom ends barely held together in stock form.
Do you have pictures of the webbing or are you just posting what you found on the internet?. And to say that a Chevy two bolt block barely held together is ridiculous.