1966 Barracuda radiator shroud / cooling questions

The radiator was recored by the previous owner, its in good shape. I'm going to flush out the whole system this weekend and put a new T-stat in, I think it has a 180* now.

I want to keep it as stock appearing as possible so don't want to go totally electric. I was mainly wondering if going with a shroud and overflow tank will take care of my problems in traffic or if a backup fan is really needed. I'll check out the clutch fan too. Thanks!