When I did this I followed some advice by a master tech that ended up with me having a timing belt off and the motor spun so I wasn't sure of timing.

After having a minor breakdown I called one of my best friends who talked me off the ledge (metaphorically of course).

He basically instructed me to find cylinder one (far left side of engine bay-aka Passenger side) and with the spark plug out lower a slim item that won't damage anything (I used a wooden dowel) spin the motor until cylinder 1 is TDC with the timing marks aligned. If you are uncertain you can mark the dowel and compare the depth to the other 3 cylinders. If I recall cylinder 1 and 3 are both at TDC simultaneously.

Jut thought I would share that tidbit and everything came back together fine after that without issues since.

ALSO- be patient and order the water pump wrench or at least spend time with decent materials fabricating one....this was a real time waster for me as I nearly ruined a water pump trying to adjust it with improper tools.

And take it easy on the radiator stopcock, it can be a pain but with finesse the plastic wont break on you.