Are all three crossmembers different? I would assume so, but before I start buying stuff I'd like a for sure. I have an 88t with a340, and I have a mkii w58. I was told to get the mkiii n/a 5sp x-member. When (down the road) I upgrade to an r154, will I need another xmember? Also, driveshafts? All different as well, or only the front half? Thanks for the input!