SB vs BB who wins?

Think he's trying to compare cid in different b/s/r ratios so 408 vs 400, he did give a 413 as an option 3.75 crank and still a better size.
Yep, but the 413 has a tiny bore, and more weight than a low deck. For relatively the same displacement, the 400 is a much better choice.
Now, if you have a 413 block you can bore .165 over.....?
413, better low end torque, sure, but rpm makes better torque and power on the big end.