Yep. OCRC is the way to go. I am also from San Diego and made the mission the last 3 nights in a row. I must say I'm addicted to that place... I run a B44 but the Turn-out for slash is unreal.
Here's my two cents if you're new to racing... Keep the slash stock..check the website for guidelines on what you can upgrade. OCRC just started a mod class for slash and some of the experience drivers are getting into it so competition is tight.
I'm not a giant fan of slash but it's obviously here to stay. I've never seen so much carnage on the track. If anyone from the San Diego area is interested in carpooling shoot me a pm.