One of the biggest problems is to have an engine lift which can lift high enough like the one on terry's picture.
When you have enough lift height it's not a problem to take out the engine/gearbox as one piece. My mechanic takes the engine out in about 3 hours, he got quite experienced after 2 QV's and a 5000s...
For me this is the most impressive picture, it shows how big the engine/gearbox pair is compared with the entire car:

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RaymondQV
Countach QV Ex-Mimran #GLA12997, Urraco P300 #20530, Jalpa #FLA12203 sold in May 2006
www.countach.ch
www.jalpa.ch
When Frank Sinatra got his Miura S in 1970, he said: “If you wanna be someone, buy Ferrari - If you are someone, you own a Lamborghini”.