Nice set!

But. . .The only worth while, read: "Safe", knuckles to tap and run a high steer/cross over steering arm are the F250 knuckles. . .which means you can only run the 3/4 ton brake parts (dual piston calipers, 8 lug hub). And are you sure you wouldn't run into interference issues with your coils and the drag link?

There are special flat top f150 knuckles used on the super cabs, but they have a much thinner casting, and smaller flat top area which wouldn't let you run an off the shelf arm safely. The last stud and rear 1/3 of the arm would be hanging off in space!

. . .From what I remember, don't shoot the messenger