Because of our long nose, it´s hard to pull the engine from the front of the car. The lift needs very long arm, and it´ll be a really big one to support the weight of both tranny and engine at the same time (extended that far out).
With a roof mounted block, I installed both engine and tranny in my recent GTA. It wasn´t that easy, the body needed to be raised quite a bit to be able to skid the tranny in. The package is pretty long.