Been there, done this... several times
Z bars, now there's a blast from the past
We have an interesting alternative on our 356. Called the Skirmit Camber Compensator & is a lot simpler. Linda and I learned the evils of swing axels the hard way on AutoX courses years ago
She loved running the 356 at SP, especially in the rain, past all the 911s, even with skinny tires.
356 T6 (has drums now, but disks waiting in shop... like so much others)