Small Block & Big Block Chevy Specific - Timing tab on ZZ4 or other "old school" small blocks?

I need to re-time my car. I know with computer controlled cars you need to set it at 6* base timing, so L98 cars have a tab on the balancer/damper that represents 6*. I have a ZZ4 and instead of a tab there is just this little indentation. Since 99% of ZZ4s go under a carb I'm thinking that is supposed to be 0*, does anyone know if this is the case?