What do you think? Does my Valiant need a Hood Scoop?

OK, you asked so gotta say I like the scoop better than the air filter through the hood look. But that's just me.
HemiMark suggests a more period-correct look. How about the 63-64 ramcharger style scoop. Also fairly low profile and not too long for your hood.
I agree with 73AbodEE, find another hood and run it with whatever scoop you finally decide on for a change in looks.