Decoding a Holley Carb

[Steve McMahan]

I understand you can decide a OEM Holley carb by the air horn stamping. If I’m wrong, sorry to bother. Here is the air horn stamp:



It’s a spreadbore carb:




Thank you.

 

[c9zx]

4165 series carb, 650 CFM, Rochester Q Jet replacement (GM). Chuck

 

[c9zx]

EDIT: 331st day of 1974 or 1984, November 27.

 

[Steve McMahan]

Thanks guys. I pulled it off a 1969 Torino with a 429 about 15 years ago. Had a spread-bore intake. BTW, did you look that up on a website or have a book? I have other Holleys I would like to decode. Thank you.

 

[c9zx]

I looked it up in a book. However, here is a link to the Tech reference, Numericl listing page. Chuck https://documents.holley.com/techlibrary_carb_numerical_listing.pdf