[Lee H]

I run my 72 without. If you decide to run without don't throw any of the parts away. In SoCal they have recently deployed mobile smog test stations and auto smog scan stations again. The mobile stations almost always have signs a few blocks before saying something like warning survey crew ahead, couple of Caltrans trucks, a mobile sniffer and they flag over vehicles randomly to get a sniffer test. The auto scanner are small and sit by the side of the road and take air samples and pictures of license plates, and you may never see it. If your truck gets flagged by either you will have to get it tested. Without that equipment your truck will fail visual inspection and will not be testable. Unless it gets resolved you will not be able to reregister. I know this scenario is unlikely to happen. March 2021 I was flagged over in my daughters 2007 Corolla, failed sniffer, had it tested at a smog check station and it passed. Minor headache.