I'm a novice when it comes to VW's.....My son and I are building a rail-buggy with a very mild 1600cc motor and I have gained knowledge on various VW sites, but the one that I recommend is
www.thesamba.com/vw
I also recommend that you go to a few VW type events (i.e. car shows). We went to a VW event a few weeks ago and we learned more about VWs during the day than anything I could have picked-up on the web. Good Luck!