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/emoticons/[email protected] 2x" width="20" height="20" />Taken all the 73-79 Trucks and 78/79 Bronco's that I've seen can clear 38's fairly easy with just a 4" lift. My 79 stock Bronco clears 35-14.50 TSL Boggers with no lift or trimming with judst a hair of a rub at full flex. So your looking at around 7" of lift. Every offroader knows fender trimming can easily add 1" to 4"'s of lift (roughly guessing) you can probably run the 39's if you watch your wheel BS (back spacing) Your down fall on that size of tire will be the gearing and a nightmare on the D44/9" unless you've swapped to a D60 already. If not just keep them in the 16.5" and get 16.5" 5-5.5 bolt pattern rims. So you won't have a set of 39x21-15 tires trying to dig up a set of 8-lug 15" rims then grind the heck out of the calipers to fit em.
