Extra electric fan?

I have a 512 rb that thankfully runs relatively cool. While driving around town in 90* weather it stays around 190. It may creep up to 195-200 if left idling for more than a few minutes. It has a stock mopar 7 blade fan and aluminum shroud I installed.

The cramped engine bay gets super hot and I wanted to cool it down after I stopped, like at a show or the strip. Would an extra pusher electrical fan be worth the effort to install? Also would it restrict flow that otherwise is working well? Any advice appreciated. I have a Holley super sniper with fan control capability but I am not sure that the controls would work after the ignition is off. I would like to have the fans run to cool it down while sitting and not running.