Also check to see whether its LP or HP, I think most early bronco's had LP Dana 44's.
If you do want to use the WJ knuckles then you will have to use the inner C's from a Dana 30. However, if you are getting a LP Dana 44 then IMO you are much better off just staying with your Dana 30. If it's a HP Dana 44 then it's still a lot of work to adapt WJ knuckles and I still think you are better off sticking with the Dana 44 steering.
Something I'll say again, WJ knuckles don't give you highsteer. The advantages to WJ knuckles are crossover steering and bigger brakes. With a Dana 44 you already get bigger brakes as well as better ball joints, manual hubs, and the option of true high steer.