I had actually tried to use a block and tackle as the first version of my storage system... it still ended up being a 2-person job due to the precarious nature of dangling the hardtop over your car. So I decided that since I will always have to have a helper to add or remove the hardtop, I designed the storage hangar for 2-people as well.
Joel, the 2x4 swing is mounted either into the rafters of the garage. But in my case, the exact spot where I wanted to hang it from was in-between rafters, so I had to cut and install a chunk of 2x4 to fit in that spot. I over-engineered it, and used "joist hangers" from Home Depot, and then used eye-bolts that go right through the 2x4 and the swing. Big flat washers ensure that this rig isn't going anywhere. I forget what strength of chain I used, but I hung from it myself (180 lbs.) and it was fine.
When you put the front of the top up on the hooks first, as you start raising the top, the 2x4 swing will move out of the way as the glass pushes it back. As soon as it clears, it "swings" back into place, and you set the roof down on it. To remove, each person holds their side with one hand (the front is still well supported), and use the other to push the swing back until you can lower the top past it.
It's brilliantly simple, if I do say so myself. More detailed pics can be taken if necessary.
Rich