When I did the clutch in my Kadett, I dropped the engine and trans with the subframe. I think I'll do that again, wasn't too hard.My opinion, and it's been disputed by some on the forum, is that it's much easier to remove the engine, bolt the transmission to it, and then put the engine back in with the transmission attached than it is to put the transmission on the engine with the engine in the car.
Those top two bolts ARE a pain if the engine is in. My first engine replacement was done with the transmission still in the car. I'll never do it that way again.