try this

since you knocked out that paint color question so fast here's another:  my 
car seems to have air injection equipment and no cat.  it's a 75 and my 
understanding is the cat came in 77 except california.  My further 
understanding ( very possibly wrong) is that the air pump is to aid the cat 
in doing it's job.  Without that it seems you're just diluting the exhaust.  
Why does my car have one and not the other?  was it originally a CA car but 
lost its cat somewhere or is it a correct 49 state model?

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