Part of why you're complicating things is that you're using the AJE as your frame of reference. This is a custom project, there is no guideline.
The LCA pivots require a box structure for the oem bushing and cam bolt setup, the strut rods require diagonal pieces of flat steel. Use the factory stock k member to make a jig to locate those(and rack) and all you have to do to make the part you highlighted in yellow is connect them all together. Keep in mind you have to do this even if you did choose to modify the AJE, how else would you know how to find the proper locations for the factory LCA and strut rod mounts?
No, I'm not confused because I'm using aje's framework as a reference. To be honest, I'm not confused at all, there's just some info I don't know.
I meant one option, was to make the box structure for the lca and the diagonal pieces of flat steel-your words, and weld them to aje's using one simple jig.
If I was to make the whole k member, I planned to make it the way you mentioned. What I was "confused" about or what I didn't know is as follows,
Diameter and wall thickness of tube to use- obviously a big deal, mostly if one builds too small/weak. Some places need bigger tubes than others, cause those places need to be stronger than others. Sure I could build the whole entire thing using only 3" od with .5 wall but that would be way more than needed and way more cost. Too small, lets not go there. My point, one can't use just any size tube. SO what dia and were?
This isn't such a big deal as the tube, but the yellow square, as we call it, can't be just any dimension either. One has a little more wiggle room here. Width of the square- width lca mount points would somewhat gauge that. There is also the distance from the square to the top of the member, the location of the rack would determine were that needs to be. Length, front to back, would be gauged by lca and strut rod location. as I said there is wiggle room here.
Have you ever tried welding a perfect square using only a tape measure and a framing square? I find it a pain, Having a separate jig just for the square would make it much easier. Then a main jig, that holds the square via rack mounts, lca mounts, strut mounts, engine mounts, ect.. but that adds cost, not much though.
I'm comparing cost and time here. Building the whole thing, how much would the tubing and plate cost again? plus the yellow square jig and the extra metal needed for the main jig for all the extra mounts(engine, rack, sway bar) that I will need to weld on, the cost of all the extra welding, VS. One simpler main jig, a little steel plate, and adj's member?
The whole reason I had the idea of modifying adj's is one wouldn't have to guess the diameter and wall thickness of tubing, a lot simpler(and cheaper) jig could be used, and alot less time making stuff