No I just know that you said that the control arms can't be lengthened by turning the JJ's out. So the only other way is longer arms that I can think of.
You make this way too fucking hard.
Alright, if the arms could not be adjusted, they would not have JJ with threaded shanks, they would just be tube with the welded on barrels to the right length on both ends. So obviously they can be adjusted out and in. In context, they can be made somewhat longer or shorter, otherwise, how are you going to set pinion angle, wheelbase, thrust angle, etc?????
What happens if you have a total brain meltdown and weld one of the brackets 1/4" out of position? Are you going to run around with a fucked up thrust angle forever or are you going to make one side longer to fix it?
Out of this context into the context of the other conversation, if you try to do a stretch like some idiots have suggested by simply screwing the joints out until minimal engagement, that greatly increases the risk of bending the shank when the fulcrum is too close to the pivot with too much weight on the other end. I know I have explained that. If it is an upper that will never find itself being used as a lever to lift the rig with a short fulcrum, that doesn't apply. If you never plan on driving offroad, does it really matter if you can bend a shank easier because it is threaded out too far?
It has also been suggested that the mid arm would greatly benefit from longer arms so just slide the mounts forward and get custom arms made to which the answer is- NO that is not a good idea because it fucks up where and how the mounts sit on the frame of the TJ. Does that mean that yours are now in the wrong spot????
It has been suggested several times that the correct location for the mounts is wherever you feel like putting them. Not quite. If you want to install it per the design, there are very specific locations. But, you aren't doing that, so now what???
We don't know where your lower control arm mounts on your custom axle are relative to stock. Given the rest of the shit I've seen, they could be 3" closer or further so that puts the question of "do I need longer arms" in the unanswerable category.
So, sure, you need longer arms. Make them exactly .738" longer in the middle and that will work perfectly. Don't add .369 to each end though, that will fuck them up.
Point being this whole exercise is way past the point of cut and dried pat answers. Every single aspect of it will have to be defined by the end goal and gathering information by cycling, checking, moving, cycling, measuring, and figuring out what does and does not work and AGAIN, if I tell you that you need longer arms and you don't, then what??????
