That was a project somebody was doing custom and was going to get a GB going with AAC, not CR3.
Hopefully the brackets will be here by Tuesday so I can get them on before I head back to school!
It would think it would be close. My 15x7 et38's are a bit sunk, I figure somewhere between 25-30 would probably be flush (atleast for a sedan rear, dont know how the P5 rear compares).
MP3/MSP links are the same. I've heard AWR links are very noisy. I had AAC a djustables for a while as well but they now make boots that go over the joints and help quiet them down.
Here's a link with some helpful info.
Do these work for all subframes? (i.e. would it allow for the RB RSB to be mounted to a sedan subframe, similar to the clunk fix? Sorry if its a dumb question.)
Definitely replace the struts. Mine had 210k on the oem struts and when I swapped them it made a world of difference (granted, I went to full coilovers). While you're there you can check ball joints, and make sure they're not ripped or anything. I recommend doing endlinks while you've got...
The aftermarket RB springs or the MSP RB springs? MSP springs will sit lower in the rear because the shocks had a higher spring perch. If they're the aftermarket RB springs they'll be fine. No experience with those springs, but RB makes quality stuff so they should be pretty good, and Tokico's...