I have a 1995 mustang originally a 3.8 liter, I took a 5.0 out of a 1988 lincoln towncar and rebuilt it, new pisons, rings, gt-40 cylinder heads, lots of goodies. Car ran fine no problems at all for a few months, and i noticed a tiny water pump leak, no biggy car never overheated or anything it was barely noticable, changed the pump and all was good. On my way to work one morning the car started overheating, might have done it for like 2 or 3 blocks maybe 5 mins tops which i believe to be a high estimate of total time it overheated. so i got to work, and found out my elect fan relay fudged up, i replaced it and the car now overheats while sitting still but not driving, i removed electric fan and still same problem with a flex fan, so i removed ac condenser still same problem, so i put an electric fan in front of the radiator along with the flex fan and still same problems, its a carbd car any help would be nice, im about to tear the engine apart and put new head bolts and gaskets on it to see if that fixxes it any help would be great. oh yeah it has new thermostat, hoses and water pump.