The engine has to kind of swivel a bit in the 'yaw' plane in order to come out the top and you do have to be quite rough with it if you're doing it on your own, even with a crane. With a spare pair of hands to guide things in and out you can do it relatively graze free, but I wouldn't say absolutely - I used blocks of wood to lever bits in and out, but last time, I even kept the radiator and fans left in while the engine dropped in.
Haynes recommends dropping the subframe and lifting the car over the top of the whole assembly and if you must avoid any scratches to the engine bay then that's probably best, but it IS possible the other way.
I think now, if I had to change the alternator, I'd be tempted to get the engine out to do it.
As for niggles, it still needs mapping to get the best out of it, and then it'll definitely need bigger brakes!. The exhaust knocks on the underneath of the gear stick casing which is quite annoying, but I think that's my fault for guessing at the position of the Y-pipe when I modded the precats with the welder Time and miles will unearth whether or not a standard mk1 clutch and SMF assembly are upto the extra torque of the 3.0.
Oh, and a Granada Scorpio autochanger works with RDS2007 and the standard speakers are