WOW a big project!
There's a dedicated forum to this kit:
http://porsche935.proboards20.com/index.cgi which I look at out of curiosity occasionally. It's mainly for those with the $525 SMS kit but there should be plenty of reference too.
Acu-Stion do a simple photo-etched kit:
http://www.hlj.com/product/ACS1229
Enjoy, and I think we ALL look forward to this thread.