COPO 9010 Carburetor

[Rowdy Rat]

OK Marlin... Here's one for you (or anyone else out there who knows).

What is the correct carburetor for the LT-1/M-40 application in the 1970 Nova? The 1970
Z-28 specs call for a Holley 780cfm; either 3972120/4490 (GM part number/Holley LIST number) or 3972122/4554 when the car was ordered with NB-2. Is there any evidence of Holley LIST 4800 ever being used (this is listed as a 1971 application)?

Thanks for any feedback you can provide.

Regards,

Stan Falenski

[YENKO DEUCE REGISTRY]

Stan;
To our knowledge the Holleys installed on the a/t Deuces were 4490's. I have not seen any 4800's, nor any 4454's. I don't know what 'NB-2' is. I have a Yenko Deuce article written by Alan Colvin in 1996 where he lists a 4556 as the carb for the a/t LT1's, but I believe that is a California carb.
M

[Chevy454]

Here is what NHRA shows:

Holl 4489-1A/SM, 4454-1A/AUTO, 4555-A/SM 4490-A/AUTO, 1686x1686/1375x1437

This takes in the Camaro and the Corvette, as well as the Nova, but is this info close to being correct?

Now, this is a little off topic, but what carb would have came on a '66 L-79 Nova?

[Rowdy Rat]

Thanks for the information guys!

I said NB-2, but meant NA-9 (my mind is starting to go - at least I got the "N" right). That was the California emissions option I've seen on a few 1970 LT-1 Corvettes. Basically carbon canister, vent line, carb shield, etc.

In any case, thanks again!

Regards,

Stan

[COPO PETE]

On my car, the carb is 3972121. List 4555.
Peter

[Chevy454]

I just cleaned up what the NHRA had listed a little bit:

Did the Nova, Z-28, and Corvette supposedly use the same carb?

[Edited by Chevy454 (12-12-2001 at 11:45 AM).]