Interesting video on roll center, jacking and roll couple.
This appears to counteract the advice from @BergmanAutoCraft that the hot ticket is the F-Body spindle and 1" longer UBJ as that appears to put the RC up at almost 8.5". Assuming my layout is correct. Based on the suggestion to get the RC as low as possible, it looks like the A-Body spindle and standard UBJ is better since the RC is only (comparatively) 5.2".
I've spent some time messing with the analyzer and playing with numbers to see if I can get the RC lower and keep some camber as the car rolls. I can't figure out how to get the RC lower than about 4" though and really not sure yet if the camber curve is good or not. This is just messing with the UBJ location, too, as I feel like the control arm pivots and LBJ locations are fixed.
Sometimes this stuff makes my head want to explode.