that looks great, there is a mk2 also being made thought it could help you for some ideas: http://www.beamng.com/threads/4922-(RELEASE-1-29)-87-Volkswagen-Golf-Mk2-GTI
I don't know how it is in Blender but in maya you can merge those overlaping verts together. The model looks nice and clean btw
well because, it was "On Hold".... for 3 years.... No, i just thought i could finish this model this time around, and try to jbeam it wake up, its happening