Nice job. I've heard of Dukes being removed from the top, but "common knowledge" says that it can't be done with a V6, at least without stripping it down nearly to a long block. Way to prove them wrong.
Did you remove the engine with the trans still bolted on? Even better!
...This was done in a notchie. Not sure about fast backs.
Once the decklid is removed, and out of the way, the opening is pretty much the same size.
The fastback "flying buttress" roofline might be in the way, however.
That also makes it much more "fun" to lean/reach over, when you're trying to disconnect stuff, but that's true no matter how the engine is removed.