I think the question being asked (but not directly by the OP) might be: Does the crank stay in phase with the cams, and the answer is yes.
The cams ALWAYS run at half speed of the crank. Every Otto cycle four stroke ever.
Because of this, the crank makes 2 revolutions to bring the cam one revolution.
It does NOT matter if the tensioner is loose or tight. The number of teeth on the crank and cam pulleys does not change, so the ratio between them stays the same. Stretch that belt to the moon and back, and the ratio stays the same. The tensioner makes sure that the belt slack doesn't allow change between the two while running.
Then, the next question seems to be: What keeps it timed correctly to the crank, on assembly? (Y'know, so it can't be 180 out)
The crank doesn't care if it's on the first or second (or third or thirteeth or millionth) of those two revolutions, because the cam timing isn't established when the belt is out (in other words, if the cams aren't connected to the crank, the number one piston at TDC is always the same as far as the car is concerned, no matter how many times you turn the crank. Bring it to TDC where the timing mark on the crank is, and it's always the same). There's no intake or exhaust or compression stroke, because the cams aren't hooked up yet. There is NOTHING on the crank to tell the motor if it's on an intake or exhaust stroke, because it those strokes don't even exist until the cams are installed and connected via belt.
The cam sensor is what tells the motor whether it's on intake or compression stroke, and THIS is why there's a certain orientation for the cams when you assemble. The crank is just at it's TDC mark (which is what the crank position sensor measures), and the cams have to be lined up to time everything (so the cam sensor can tell the motor if it's TDC-overlap or TDC-Fire). If you put the notches in the wrong direction from the service manual, THEN it's 180 out. (I do not not know if they orient to center or outboard on that motor. Your manual will confirm that)
Also, buy a factory water pump, NEW, NOT REMAN. Trust me. The parts store stuff (including the CHRYSLER/Mopar reman) will not last and when it goes....