A Magnum based stroker: 6.7L or 408?

So I got into a little discussion with another Mopar fanatic here in UT. He's building a 408 Stroker just like me. Both of ours are based off of a 5.9 Magnum. We were discussing "callout badges" especially on hood scoops and rear quarter callouts.
I told him for nostalgic tastes I would stick to 408 cid, even though I'm doing a kind of a restomod build like he is.
But he said to be more accurate would be to use the 6.7L for Magnums as all modern Mopars use liter designations.
So now I'm curious what does everyone think?
Please keep it civil.