84 mustang water pump

[supernick519]

built a new motor for my 84 vert nothing to special can anybody tell me what kind of water pump it is supposed to have its carb motor with the factory front i used all the original pulleys a/c smog and all.. i picked up one from advance they said was the right one i put it on and its not acting right its building up alot of pressure and putting it in the overflow and the bottom hose gets warm and the top hose stays cold .. what direction pump did they go with in 1984 from the factory