The crank pulley CAN'T go on too far if correct parts used. There are three or maybe four, the outside washered bolt that holds it all together, the pulley itself, and the cambelt sprocket which can be one or two pieces. This on zetec.
The sprocket: two pieces if the actual sprocket has the teeth run off either end, that one requires a washer behind it, the washer keeps belt from walking off the backside of gear teeth. The one piece sprocket has that washer built into it, the teeth only run off on one end, the other end is bigger so it again keeps belt in place. Either sprocket should be marked 'outside', putting on incorrectly could fudge things up. The two piece sprocket when put together is the same thickness as the one piece is.
If the correct parts used and in proper order there should be no way the tightening can lock up crank. I'd be measuring how thick that Dorman damper hub is as compared to the old one, needs to be same thickness.
Better hope you didn't lock up at oil pump, that could very easily break things inside to ruin the rest of your day. You could also pull all three parts off to get bare crank, stick the front washered bolt back in crank for a prying surface and pry crank forward and then push backward to check how much crank endplay you have, if more than .020" or so you got dead crank thrust bearing, motor comes apart for that. There is nothing that can fall out of place inside, the thrust is fixed in place, it can only be dead worn out.