72 340 Trap Door Air Cleaner

Reminds me of a newspaper column I used to read weekly "Can this marriage be saved?" Written by a psychologist, i guess. Substitute the word "air cleaner" for "marriage".

Anyway, if those people ahead of me change their minds, I would like to make a deal (shiping to zip 95252). Thank you (building a 340 for my '72 BBody).