Upgraded Holley 780 cfm carburetor with vacuum secondaries. Upgrade options are: 

1) Milled air horn to improve air flow.(40 cfm increase).

2) Adjustable 6/32" brass air bleeds:

Primary air circuit: 

Idle Air Bleeds .073" 

High Speed Air Bleeds .032"

Secondary air circuit: 

Idle Air Bleeds .032" 

High Speed Air Bleeds .028"

3) Primary Fuel Jet: #76. 

4) Secondary Fuel Jet: #82.

5) Nitrophyl Material Secondary Fuel Float. 

6) QFT High flow .110" needle & seat valve.

7) Tube type .031" Accelerator Pump Discharge Nozzle. 

8) QFT S.S. Accelerator Pump Discharge Check Needle Valve. 

9) QFT High flow (4 port) Primary Power Valve: 5.5hg. 

10) Secondary Power Valve: Plugged 

11) New Unstick Gaskets

12) Polished Aluminum Finish. 

Carburetor is set up, for a low vacuum signal, due to radical camshafts, used for street/strip engines, it needs to be fine tune,for your specific application. 

Buyer should verify fitment on its particular application. 

No returns are accepted. 

UPS ground shipping to the lower 48 states. 

Payment is expected within 2 days after purchase.