So to clarify,
I need adj. front CAs for the SSSYE w/ tummy tuck, but I don't need them with a SSSYE w/o a tummy tuck
I need Savvy TC shift linkage for the SSSYE w/ tummy tuck, but I don't need it with a SSSYE w/o a tummy tuck
IMO, front adjustable arms are a benefit but
not a necessity - either tucked or not.
Correct, you won't need the cable shifter until you tuck that case up into the tunnel.
In case it's been overlooked, a 1.25" body lift will make your tucking process a lot easier.
is it mandatory to get an adj. rear track bar when I get an angled rear track bar bracket?
The adjustable track bar is necessary with the angled bracket because you'll be changing the angle of the mounting position, i.e. clocking the mounts. If your Jeep is not a daily driver, I'd recommend holding off on this purchase until you get your pinion angle dialed in. There's a chance you won't need this depending on a variety of things like lift height, how much you tuck, and how much travel is allowed by your bump stops. Whether you're running a gas tank skid or not might also make the difference for you. In my case, I ended up needing the adjustable bar and bracket but I held off until I had exhausted every option. I ended up waiting another few days for the parts to arrive with the Jeep out of commission.
Here's a link for the JKS kit.