What Holley Carb do I have ?

[Don Z.]

I have been scratching my head and trying to figure out what Holley I have. The numbers do not look right according to my Tech Manual. I have a 1966 with a base 327 / 300 with A.I.R. My carb numbers are 3884505 LIST 3367 0627
As always any help in determining this carb will be greatful.

[Bill Clupper]

Re: What Holley Carb do I have ?

1966 Corvette base engine standard carb. The four diget date code indicates a service replacement carb.

[Don Z.]

Re: What Holley Carb do I have ?

Bill:
Is the 0627 the date code and if so how is it read? The tech manual shows alpha codes as the month!I also noticed the vacumn advance line is a hose and I believe it is supossed to be a chrome tube with a small piece of rubber tube. Can this carb be off another type GM ?

[John H.]

Re: What Holley Carb do I have ?

Don -

The correct carb for your application (with A.I.R., RPO K-19), is GM #3890499, Holley list #R3605A; the 3884505/3367 you have is for the base (non-California A.I.R.) engine. The "0627" date code is in Julian/Year format - yours would be dated March 3, 1977 (4-digit Holley service carb date codes started in 1970). The carb should have a nipple just below the choke unloader diaphragm for the distributor vacuum advance - the reduced-diameter end of the metal advance tube with the upset collar on it fits inside this nipple, and a rubber hose covers this connection. There should be another nipple at the right front of the carb base for the vacuum signal line to the A.I.R. valve.

[Don Z.]

Re: What Holley Carb do I have ?

Thanks John, I will have to look at the details more closely that you have given to me. At least I can put this to rest and sometime look for a correct Holley. Thanks again John ( and Bill)