The outlet can be adjusted to quite a range of motion. I have mine in the corner of the tank and pointed lightly diagonally towards the front of the tank. I also have a circulation pump at the other end because there is no way it would circulate both ends of the tank. I have the XP3 (new version) and a 55gal tank, but I think you would have to do the same thing with the XP4 and a 74 gal. Either that or get two filters which might not be a bad idea anyway in case one goes down.
As a side note, I did greatly dislike the output tube as it did not have any barbs to keep the hose on tight. I had to use two hose clamps including a metal one I bought separately and it still leaked for a day. I had both clamps cranked as tight as I would dare without either ripping the tubing or cracking the plastic outlet pipe.