Help me win this argument 400 in a 72.

It's funny anytime someone wants to builds a 273/318 even a 340 most on here say don't waste your time or money, no replacement for displacement go for 360, then as soon as someone wants a big block everyone no go 360, sure you can buy cheap *** headers for a SB but if you buy quality there gonna cost the same, plus headers and aluminum intake will bring it closer to the weight of a stock SB, I'd go 400 over 360 or even a 408, 400 has better bore to stroke and rod ratio compared to a 408.