I purchased a 79 TA with a 455 4 spd.. the car seem to be running a little hot around 220-230. i decided to go through the cooling system. i drain the radiator and found some dirty/rusty antifreeze at the end of the drain. I then pulled thermostats that foolish thing was bent to hell. never seen any thing like that before. i removed the water pump also. so i decides to fulsh water throung the block to see if i could get the rust & sediment out. once the water coming from the blocked looked clear. i install all the parts. when i took the car for a ride it seem to be worse. after about 20-30 minutes driving the temp runs up to the 240 range. I think some of the head ports are plugged.