Early Bronco Specialties in Boise, Idaho, had the task of fitting a '78 NP435 underneath, which required nothing more than a modified crossmember and an adapter. To cure driveshaft angle, there's Six States Distributors Extended Duty components. The Bronco's underside features a Dana 20 transfer case with 2.34 gearing and 4.56s in a Currie Dana 44 with an ARB and a Ford 9-inch with a Detroit SofLocker. For minimal bash, a Go Rhino! axle truss and skidplate cling to the vulnerable parts.