Hood Scoops

[71Duster]

I've been thinking/wanting for a long time to put the twin scoops on my 71 Duster.

First questions is what repro's are good and bad?

Second I know its mostly cosmetic but I can't imagine it wouldn;t help with under hood temps, yes or no?

Any rain issues? I'd figured of making foam plugs for when I was caught in the rain