When the cars are put together they put the engine in through the bottom then put the subframe and suspension in.
Taking the engine out from the top is still pretty easy, just make sure all of the mounts and accessories have been removed. I don't think you need to take the alternator off but everything else should be.
The hood on these cars can open almost vertical which is a huge help but I still recommend taking it off, especially if you have someone around to help.