I'm new to the Z scene haven't had a Z since 1996 are there any clubs in Northern Cali?

BIGREGG,

Welcome back to the scene!

http://www.zonc.org/

Z Owners of Northern California is the biggest group that I know of. Their events are usually more in the North Bay. A less popular group would be BAYZA (Bay Area Z Association), however, they are a younger crowd in the South Bay.

ZONC has a few fun events coming this summer.

http://www.classiczcars.com/forums/dto_clubs.php