I'll find a better pic, but here's a TT/R32/LCR cast wishbone on a standard pressed steel MKIV one. You'll note it is longer, that's where you're getting your camber from, it isn't adjustable though.
Also note the wishbone bush, looks quite big and sloppy? It is. Ideally you'd want the very early TT wishbones as they have a much smaller bush (they were all recalled and swapped out for 'safer' big bush versions), but you can buy Defcon reducers to use the early TT bush - it's almost like running solid links, the turn in and feel is amazing.
Their hubs also are different and change the roll centre of the car, allowing you to go low and not suffer the vile MKIV trait of bumpsteer.
I guess you need to see what you have already to decide how far to go? But there's the LCR quickrack (requires someone good with coding) and it also had different rear beam bushes. Don't go poly on these, they absolutely don't work.
If you're at Coombe next weekend, have a word with Team Bora (I should be there too) - they've totally refitted the car with all these mods and considering it has cock all power, it doesn't half get around a track quickly. I've driven it on the Ring and around a few tracks, it's like no MKIV chassis car I've ever driven.
