I have a 1995 mustang GT that has a mysterious overheating problem. The engine has been built with a bigger Cam and bigger aluminum heads and lighter aluminum pistons. The engine has all new components. It has a 3 row radiator, and all new cooling components and a new temp sensor. And we swapped an automatic transmission out for a 5 speed manual. It overheated before we did all the upgrades and we figured once the build was complete it would solve the overheating problem but it still overheats. The timing has been corrected and is perfect. The valves are set right and it runs and performs great but overheats really quick. At this point I’m at a loss. Like I said all new parts in the cooling system and motor and new transmission. It also has a new driveshaft and a newly built .373 rear end with posy-traction. The fan kicks on a runs when it gets hot and works perfectly. Any ideas??