Looks like I've talked myself into doing a radius arms setup at the 11th hour. I'll just have to keep things on the cheap affordable side as best as possible.
Conveniently/suspiciously, my Facebook feed today showed a local Marketplace listing for an adjustable track bar (panhard bar) and OE sway bar with disconnects from a JK Wrangler. Met up with the guy, talked shop, observed the cringe-face when I mentioned "unibody", and made the deal for $100 for everything. Track bar could be a $115 Amazon knock-off, a $150 Rough Country unit, or $325 Teraflex unit because they are identical. Key thing is that it's shaped to wrap around the diff cover and it's adjustable...and within the range I'd need it. Does need to be freshened up and bushings replaced, but that's easy stuff.
The JK sway bar is straight and beefier compared the R50 unit, which I was already planning to reuse but poses some complications because of the shape. I'll probably toss or sell the disconnects that it came with; they're worn, but appear to be a rather expensive Teraflex set. I plan to run disconnects either way.
Engine support bar arrived the other day and the garage is as clean as it's getting. I may start tearing things down in the morning. To be honest, this project terrifies me more than any other I've done so I'm dragging my feet to dive in. Pulling stuff off is easy, but there will eventually be a point-of-no-return moment that I hope I don't dread.