I am using the 6 bolt Gm/jeep knuckles. Mine happened to come off of an early 70s chevy so I could drill them for histeer. The ford knuckles and spindles use a 5 bolt pattern instead.
As far as my front end here is what I am using:
1970's chevy dana 44 knuckles. The passanger side one has been drilled and tapped for histeer. Otherwise they are just standard knuckles.
For balljoints I went into Napa and asked for upper and lowers for an 1982 jeep waggonner. They fit the chevy knuckle and the Cs on my waggoneer axle.
My spindles were available on early 70's waggonners and some chevys but I got them new. Part Number is 706528x
My brake caliper is a rebuilt one from napa for an 1982 jeep waggoneer.
My brake caliper bracket is off an 82 jeep wagoneer.
My brake roter is from a 1989 4x4 f150
My wheelbearings are from a 1989 4x4 f150
My locking hubs of from a 1989 4x4 f150 (though any dana 44 locking hub should work)
My inner and outer axleshafts are from an 1982 jeep waggonner
It all fits together perfect and works great. The above info is what you need to run 6 bolt knuckles and beable to run a 5 on 5.5 bolt pattern. If you want to go 6 on 6.5 just get the stuff off a chevy or jeep and your done.
The caliper clearance issues I was having earlier in the thread was because I had the wrong spindles. The 1982 wagonneer spindle wont let an f150 inner bearing onto the spindle because the bearing is to small. I then tried a 1989 f150 spindle. While it let the bearings on the spacings were incorrect and wouldn't let caliper fit onto the bracket. I could have probably cut up the bracket and made it work but brakes and steering are two places you dont half ass how you do stuff. By getting the spindle listed above it allowed everything to line up and fit perfect.
Here is a good site that I got alot of my infor from when trying to piece my system together.
http://77cj.littlekeylime.com/flatop_knucles.html
Hope that answers your questions.