Brown's Fairfax Nissan seems to be pretty receptive to modded Zs...
As far as other shops in the area, we've been checking out Leehigh Auto and D&V Auto over in the Chantilly/Dulles area. Function Tuned is there as well (G/Z specialists). AAM Competition just opened their new shop out in Annapolis Junction -- they did Lou's TT build.
If you're like me, you just DIY everything that's not overly complicated.
When are you going to come on out to our Saturday meets? We need a 40th Anniversary there!!!