I tilted the engine the first couple times as well. I didn't have any ratchet straps, and didn't know about rocking the engine with the car on the ground, so I just grabbed ahold of it, pulled on it with one hand, and tied it off with a rope to my workbench with the other. Pretty rigged up, but it worked.

Now that I have most of the brackets and stuff out of the way in the back, I don't worry about rocking it.