Holley Carburetor Base Plate ID

[Timothy B.]

Can anyone confirm what carburetor this Holley base plate is from. I got it with some carburetor parts and not sure if it's GM or Ford but from the plumbing it looks like big block GM from the sixties era. The throttle bore is 1 11/16" and it's got ported vacuum for the vacuum advance.

Thanks for the help..Tim

[Clem Z.]

Re: Holley Carburetor Base Plate ID

Can anyone confirm what carburetor this Holley base plate is from. I got it with some carburetor parts and not sure if it's GM or Ford but from the plumbing it looks like big block GM from the sixties era. The throttle bore is 1 11/16" and it's got ported vacuum for the vacuum advance.

Thanks for the help..Tim

is there a casting # somewhere ??

[Timothy B.]

Re: Holley Carburetor Base Plate ID

is there a casting # somewhere ??

Clem, In the front there is the number 12 R3390B. The B could be a 8 but looks like B to me. This number is cast not stamped into the base.

[Clem Z.]

Re: Holley Carburetor Base Plate ID

clem, in the front there is the number 12 r3390b. The b could be a 8 but looks like b to me. This number is cast not stamped into the base.

1969 780 cfm gm

[Timothy B.]

Re: Holley Carburetor Base Plate ID

Clem,

Can you tell me what engines used this 780 carburetor.

[Clem Z.]

Re: Holley Carburetor Base Plate ID

Clem,

Can you tell me what engines used this 780 carburetor.

my guess would be any high performace GM engine that use a 780 holley.