[Huge_Ferret]

So long as you are prepared to take out the radiator at the same time as the engine swap (which is very helpful for space anyway) then the engine will lift out and in via the top.
The engine mount thing i mentioned is that the passenger side mount is recessed in to the main chassis rail and must be completely removed to allow the engine to be lifted upwards (4 extra bolts)

In terms of how much to lower we are talking about the depth of the mount so 4-6 inches which is a breeze so long as the driveshafts are already out which they should be by that point anyway.

I suspect the Haynes doesn't want you to take more than it considers necessary apart for the job, hence leaving the rad and passenger mount in, the other advantage of the engine being removed from the top is that you are left with a rolling chassis and don't have to take the front Subframe off.

The hole in the chassis leg is shown in the pic above and you can see where the 4 bolts hold the mount in, other than about a 30 degree twist of the engine towards the front and the gearbox towards the back as you remove/fit the engine its not bad at all.

Let me know if you want any more info.