Modify the steering to fit the rig, not the other way around. Moving the shackle (to where??) will require an equal modification to the other side and then you will be left with screwey, possibly unsafe geometry. My '72 has the Saginaw ps without any suspension mods.
I realize the sides have to mirror each other. 4X4Labs moves theirs to accommodate the beefier reinforced frame horns they create for their install. The CO kit is really reasonable but is short on actual step by step directions. I am gonna get it done, though! Probably the plate can be trimmed a bit to prevent encroachment on the drivers shackle hanger. I may do a build along since there seem to be many posts covering it, but few actual installs covering each step with detailed pictures, parts used and part numbers. Again, many authors cover the broad install really well, but are short on details, and I believe this makes things harder for guys with less fabrication experience, and easier for the shops that perform these installs.
i would agree with you that alot of things you buy for your rig have little or no instructions at all. very hard to figure things out if you are first timer. alot is learned by trial and error i suppose.
there is really not alot of wrong way right way. maybe thats why no one includes instruction. i dont know
pm me for help. i can get pics and break it down for you