More info needed: that eng always ran hot in that car or in the car it came out of also. any idea if the rad is partly plugged. not usually critical is pulley ratio/# of vanes but post what you have. shroud or no shroud. fan distance from rad. fan type (did you say flex which ain't good). #1 #1 does it run hot stoplight to stoplight or out on the highway (or both). I'm assuming mixture is OK (no vac leaks) & hopefully no combustion leaks and you said timing is OK. stat opening all the way. pump nipple side does not matter. Holler when you can