The older (pre-90) Broncos just had 13 regular 10mm bolts holding the top. Newer ones have the tamper-proof Torx bolts. They are fine-thread and it will take up to an hour to remove them the first time. The top only weighs 120 pounds, but it will seem like 200lbs. due to it's size. A muscular dude like myself can undo it alone, but it can be a challenge if the wind is blowing 30mph like it does all the time here! Do yourself a favor, and get a friend or two to help for the first time. Store the top on some old tires, not upside-down, not flat on the ground/floor, to protect the bottom seals and keep the top from warping. I have removed and installed my hardtop several times over the past few years, with no problems with leaks or fitment. I just hate the bulky top and like the open air of the Bronco, so I now only use the top when it gets cold, like below freezing. That happens 1 or 2 weeks in February every 2-3 years down here!!!