How can I tell what Holley Carburetors I have

[Moparbob]

Hey,

I have two Holley's, one is about brand new. How can I tell the CFM of them and determine if one of them might work on my semi stock 440?

[Ghoste]

What is the list number on them?

[Moparbob]

What is the list number on them?

Where do I find it bro?

[Ghoste]

Look on the outside of the choke horn.

[Moparbob]

Look on the outside of the choke horn.

Looks like 6931 on one of them (the best one)

[400/6/PAC]

Yes, there should be a number stamped on the choke horn
That will be something like 3310 Or whatever.
That # will cross referance in the Holly book to give You the CFM.
I have the books if You can get Me the #s.

[Moparbob]

On the back of the choke I see 3310-6 and  1030

[400/6/PAC]

I'm not finding 3310-6
3310 and 3310-1 is 780 cfm
3310-2 3310-3 3310-4 are all 750cfm.
I'll do some more checking to see if I can find 3310-6

[Ghoste]

3310-6 is a 750.

[Moparbob]

Sweet,, Should go ok on a semi stock 440 ok??  Got a lunadi cam and a torquer manifold, headers. Its in brand new condtion

[Ghoste]

It will work great with a mild 440.  Here are the numbers from the Holley catalog.

Carburetor part number/Model number/CFM/ Renew kit part number/Trick kit part number/ Needle and seat/Primary main jet/Secondary main jet/Primary metering block/Secondary metering block/Power valve/Pump nozzle Size,


R3310-6/ 4160/ 750/ 37-754/ 37-933/ 6-504/ 122-72/ 134-21/ 134-131/ 134-21/ 125-65/ 0.031

[Moparbob]

Awesome!  Were getting close,, just need a 971 oil pan! (hint hint)