You have to remove all of the top end (turbo, intake manifold, etc)of the engine. It took me a couple days [but I don't have a full garage either]... make sure you don't drop anything inside the block.
Having just done mine for the first time i could do it now in probably 1 day, the first time took 3 days, but it was really hot outside and i had no clue what i was doing. Watch the SR Master mechanic on youtube he really helped me get through it.