thermostat question

I have a 440 .030 over in my Duster. nothin spectacular. In going to the car show 2 weeks ago when it was 102 outside, I had to run about 40 miles on the interstate and some city traffic. I pulled in the lot and parked and shut it off and noticed the overflow bottle was pouring out water. It has never done this before but yet it has never been runing in 102 degrees before. I think my son overfilled the bottle a little but I was thinking of pulling the thermostat out and running it that way. I dont need it in for a heater or anything. I dont think it will hurt and it may run cooler. what do you guys think about running without it.