Fascinating... I started trying to remove those bolts, there are a ton of them, but then noticed what seemed like part of the bellhousing on the other side (engine side) of that whole assembly so it didn't seem like if I got them removed it would help any...
I will take another look now that it's out, maybe that bit of bellhousing does come off and I just wasn't seeing it.
The part that is tripping me up is that I had about 1/2 and inch of daylight all the way around the bellhousing, minus the alignment pins, but it wouldn't budge... Really felt like something was holding the converter (whatever it's called) on the input shaft...
If I can get it off without having to unbolt the flexplate I will tell you how I did it so hopefully the seized engine stops being the roadblock.