Okay, I got it. I actually did it the opposite way: I put the subframe bolt in first, pried the mount and installed the upper bolt, then REALLY pried on it and installed the lower bolt. I'm by myself tonight and I had to push the prybar with my foot and then blindly finger tighten the bolt, but I got it. I couldn't seem to get enough leverage in the right direction doing the subframe bolt last. It wasn't so bad, probably took 20 minutes.
Thanks a ton for the idea!