Thoughts on Cooling a Stock 383 HP Barracuda/Dart.

I'm running the stock radiator, new core and tubs, in my 67 GTS which doesn't have a shroud which is how it was purchased when new. I found a shroud for it but haven't installed it yet. Running 180 thermostat with flex fan that has the same number of blades as the stock fan. Temperature goes up a little on a hot summer day sitting in traffic or at a light for awhile but still within the lower half of the marked range on the stock temperature gauge. I assume the bottom of the market range on the temperature gauge is 180. While driving down the road it stays down at the bottom of the marked range or just above the bottom. Have you tried running water wetter. I put it in and noticed better cooling.