Anyone know what the list number of the carb on a LS6 or 7?
What I am really looking for is what they would have jetted the carbs?
For vac. or dbble pump?
I figure if I have the list numbers I can look it up ?
T.C.

those carbs have a few different numbers, but except for the the choke stuff they're really just 3310-1s. they had front and rear power valves. jets are 72/76, PVs were 105/85. I have also seen 65 secondary PVs.

Thanks for the reply Tom:
So all those big motors had VAC secondary carbs. on them?
Any you know of run dbbl pumpers?
If so, do you know the list numbers and jet sizes?
Thanks for your help T.C.

yes they all had the vac sec carbs, I don't believe GM ever sold a dbl pmpr on a passenger car. There might be some 60's Vette ZL-1 type exception.

On the list numbers, I don't have a list. Google is your friend......

TC;

The list number for a 49 state automatic car is a 4492, a 49 state 4-speed car is a 4557, a California automatic got a 4556 and a California manual got a 4491.

All of the above carbs were jetted the same at 70 primary and 76 secondary, and were equipped with an 8.5 power valves primary and secondary.

As far as double pumpers, the only "common" one was for the `69 L88/ZL1 which used a Holley 4296 carb that's rated at 855 cfm.

Hope that helps.
Eric