64 barracuda overheating issues

Factory temp. gauge 1/4 mark is 160, 1/2 is 190...Sounds like your running too cool which is not good for your motor either and your not tapping all your HP. I use a "Robert Shaw" t-stat 185-195 (can't recall) and run my 273 Commando hard in 95 degree /humid days....she teeters between 190-210, back to 190 range (I use both factory & aftermarket temp. gauges.) I have the stock 2 row radiator & Mildon water pump.