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I would like CARB to propose that all pre-1976 models to have a
catalytic converter that has a medium-light to medium constriction.
They would need to do 2 tests the first time and one test
thereafter. One before the cat is installed and one after the cat
in installed to verify that the cats are working properly. I
believe they should be tested every 2 years like all California
autos. Thirdly, the test should only verify that the cat is working
properly. 

My reasoning is it will satisfy both parties. Cleaner air for CARB
and the rest of Californians and also alleviate pressure to know
the specific cat tests with lower emissions than pre-installed cat.
As long as owners have the cat on, they don't have to worry about
anything else. The emission tests done are just to verify that it
is making lower emissions in general.