I see two maybe three routes depending on you and your needs/wants. Some questions first though, do you still enjoy driving the bronco on the rare occasion you go through the effort to do so? Do you still enjoy wrenching on the bronco? Is there something you would rather be doing than driving or wrenching on the bronco?
Option 1 - Remove the barriers keeping you from driving the bronco. Build a shed for the clutter in the garage or have a yard sale/donate/throw stuff out. Sell the vehicle you have in the driveway or put it on the curb or expand the driveway/garage so it's out of the way.
Option 2 - Give or sell it to one of your kids if they're interested. Throw in a stipulation that they have to offer it back to you before they sell it to a stranger or that it can't leave the family until your gone, it's morbid, but hey it's yours.
Option 2.5 - Determine a fair value for it and list it or put it up for auction.
People change, hobbies change, and if nobody ever sold their bronco, almost none of us would have a bronco. Not to say there wouldn't be a following, just most of the people here wouldn't be part of it.
Nothing explicitly wrong with keeping it in the garage like you are now, but is it bringing any joy to you life? Maybe you just like looking at it behind/under a bunch of accumulated stuff, kinda odd, but to each their own. Life's to short not to live it, if you're still into it, keep it and drive it. If you're not into it, pass it on to someone else and use the funds to buy or do something that does bring you joy.