Of course it depends on what else is going on. All the systems need to be working correctly. Mine passes smog every two years. Timing is set to 7 BTDC. Idle mixture is set per the lean drop. You should be able to get there too.
Here is a link to my smog results over the years: California...
^^agree that you should have measurable residual oxygen. Something is wrong with your AI system. Without enough oxygen the catalytic converter won’t work.