68 Smog Pressure Relief Valve Cap
 

Looking for a Green Plastic Cap, which is circled in Red in the picture for the Pressure Relief Valve on a 68 Smog Pump.

I might be wrong but that is part of the entire relief valve itself, different colors correspond to different ratings and applications. I have not found a source, But Maybe a SMOG parts supplier might sell them.
https://marvelousparts.com/pages/about
or Is Bill Hodel still in business?

I ready reached out to Hodel and waiting for his response.

Hello sir did you find your green poppet relief valve ,I have an nos part

Not yet

I would like to buy the green plastic cap. Thank you

Hello sir is cap worth 30.00 my number is 724 733 7726 bob jones

Yes, I have no problem with that price.