IT'S time for me to replace the thermostate in my 95 full size w/5.0. I use the truck as a daily driver. and tow a 19ft. trailer about 350 miles a week with it. My question is am i better off with a cooler temp (160)degree or go with the 180. I was thinking the 160 being the summer is here and the towing making the engine run harder. Not sure of any drawbacks. Any and all comments welcome.