You should have no problem dropping a 911 engine/******. I've dropped 914 engine/****** assemblies plenty of times, and I even have the engine bar to deal with, and I've yet to even have to remove that.
Set your HD-9 to it's widest setting of 43" apart between the two runways and lower the whole thing down, just a couple of inches up from a furnitre dolly (which will fit perfectly between the ramps), so that you can then loosen your bolts from the engine mount and ****** flanges and let it fall gently onto the furniture dolly. Then lift the 911 and slide everything out the side or to the rear.
By the way, the one ramp that slides over for the wider setting can go wider than 43". 43" just happens to be where there's already some holes drilled out that allow you to bolt the ramp on to the cross members. If need be, go a little wider. The one ramp with the cylinder under it will of course stay bolted down so it's not like your car is going to move if the ramps are 44" or 46" apart. Anyway, post some pics after you get everything set up. You're going to love this lift.