My dad has always told me that his '69 road runner (bone stock, but driven hard) w/ a 383/727 and 3.23 gears would run right beside every 440-4V car he ever raced. Two in particular were '70 cudas, both U code 440-4 cars.
Stock vs. stock, I don't doubt it. Start throwing parts at em though and cubes are king.

Makes sense when you consider both used the same cylinder head, cam, and similar induction. The 440 will just turn less rpm.

Good friend of mine had a drag car w/ a 440 w/ a decent solid FT cam, M1 intake, dominator, and stock 346 heads.
He wanted to upgrade to a 493" stroker, but didn't have the money for heads so we put together a good 493" bottom end, but reused the cam, heads, intake, etc.
It ran 7.30s in the 1/8 at 440".
It went 7.20s at 493". Converter was a lil tight w/ the 440, pretty sure the extra stroke just made better use of the tight converter.