I've only had my bronco for 2 years, and I did not know about this forum when I first got it. I did not get the advice to drive it for awhile before tearing it apart. I started pulling the body off the day after I brought it home. I was not a bronco purist, I just love the looks of the classic bronco. I am a restomodder at heart, I have built a few mustangs over the years, and so when I started my ground up rebuild I had no intention of keeping it remotely stock, so my Bronco has very few original parts, and I have no real idea of what it is like to drive a classic bronco so picking the best upgrade I have done to mine is a bit difficult. I will list a few of the things I changed because I didn't like the stock version.
I am no great artistic designer, most of my modifications were borrowed from things I have seen other people do, I borrowed the ideas and fitted them to what I wanted.
-complete custom dash with personalized gauges. I've never liked the stock single gauge, the dash is probably the thing I liked least about the original bronco. I had this dash custom made by Double D fab. it is not a modification of my original dash it is an entire new fabrication.
wild horses fender flares and cut rear fenders. (I know this one is very controversial, but you either like the LUBR look or you don't, I don't, and this is the appearance that made me love bronco's)
I didn't care for the 71 style external fuel cap I considered replacing it with a 77 style, but ended up replacing it with a capless version that I think looks great.
5 speed manual transmission
amp research power steps. I love these, not only are they very functional and make getting in and out of the truck much easier, but they are just cool and unexpected by most folks looking at the rig.
but probably my favorite modification is one that was rather expensive, completely unnecessary and basically just for show. my dual quad sniper EFI system. I know a carburetor or single sniper would be just as good or better from a functional standpoint but I love car shows, and one of my favorite things is a nice looking engine compartment. I love the way this looks under the hood, (the hood shocks are nice too lol)