I can recommend Marty in Montclair which is up in North Jersey....
But he used to wrench for the Z Club shop back in Clifon/Paterson from 1978 until its demise in the mid 1980s.
He knows S30's intimately.
Tell him Greg with the light blue 76 280Z sent you.
Marty Thompson
CRE (Canyon Racing enterprises)
973 509-1005