if you can't find anyone in your immediate area, i can STRONLY recommend tidewater z in poquoson (near hampton roads area). i know it's probably 11/2 + hours away, but they have been there forever, and Todd Wagner (one of the owners) is the president of the tidewater z car club. they have helped me since 1988 and i have purchased a 240z from Todd. they have always been honest and reasonable. The number is (757)868-6753. they might even know someone near you that they can recommend.
You should check our datsun dynamics. I know of one in fairfax va,about 30 miles away, that is pretty good for repairs. Even though they work on all japanese car now, they have been working on datsuns since the 70's.
Datsun Dynamics is good. The best is Banzai Motorworks in Maryland, 301-937-5746.
Also, the Z-Car Club of Northern Va meets the 2nd Wednesday of the month, 8pm, Bertucci's on Rt 7 across from Tyson's Mall. For info call pres Mike Bell at 703-255-7217.