Wow those setups with a wide frame lower arm and trailing links look like bind city.
So many of these different IRS setups seem so hokey. I agree with the other poster who said, in essence, why wouldn't someone just go with what's known to be the best setup ? Upper, lower a-arms using ball joints and a toe link (can also be done with a lower arm in a non-ball joint arrangement that uses the 2nd link as kind of a toe link, you see this on some race cars. I don't like it as much as you can't tune the toe curve).
I see a lot of things I'm not fond of in the OP photos, but putting that upper pushrod link (ie all of the shock load) on top of the spindles UBJ is incredibly dangerous. No way is the spindle supposed to see that type of load. That pushrod needs to be brought down to the LCA. IN addition to Ironworks concerns about length and binding etc. It should be easy enough to do, just have to get it around the axle but there is articulation room there.
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