Are you planning on running that "wrap around" chevy steering arm?
Looks like the 3/4 ton D44 GM knuckles on a Ford D44. I'm startin to think Dodge ran that style for a few years. Did they?
Either way, if you're gonna run the drag link from the pitman arm to that steering arm you're gonna come across quite a few problems.
For example, reversed steering. When you turn to the left, that arm is going to move backwards and to the left turning the wheels to the right. Unless you plan on using the GM style gear box in which the pitman arm turned forward and backwards, rather then left to right.
The other big problem with that system is it tends to pull the chassis rather then move the tires.
Tons of bump steer.
And you'll actually loose the ability to turn in some off camber situations.
Ask me how I know....
Sky Off Road Design makes a great high steer arm that's thick ass hell, uses 1 ton GM TREs, and uses the factory studs with no need for spacers.
Is the passenger side knuckle a flat top too? You could always have that drilled and tapped for another high steer arm and run traditional cross over.
Or because the dude that owns the only junk yard near you is potentially a dick like mine and won't sell you parts unless he pulls them and charges you out the ass to undo two castle nuts, you could could get creative with another driver side flat top and a double ended arm, and clocking the caliper mounting plate a few bolt holes on the spindle bolts till it's on the same position as the driver side.
Some one might chime in on that one, but that's what I'm up to right now.