I got a problem with my mustang overheating. It's a 88 GT with a DSS 306 motor swap and a built TSI automatic trans. Its got trick flow aluminum heads, trick flow intake, msd ignition, timing set at 12, ford racing radiator, weiland waterpump, 160 thermostat, March underdrive pulleys. At slow speeds, traffic, and ideling, it gets between 210 and 250 degrees. It has a brand new thermostat, the system pressurized, and stock clutch fan. When it overheats, the upper hose gets hard. Also, i used to have a flexalite electric fan in it, but it barely helped. Does anyone have any suggestions on what is wrong, or what I can do to fix it. thank you very much in advance and sorry for the long post.