Quadrajet 800 CFM High Performance 400 - 455 Pontiac

Description

Quadrajet 800 CFM High Performance for 400 - 455 Pontiac engines with more than stock specifications.
This carb was rebuilt and modified internally completely by Thomas Quadrajets in 2019 and used on my 450 hp Pontiac 455 engine in a 76 Trans Am.  I freshened it up with a new choke pull-off, gaskets, electric choke, filter,  and blue fuel resistant accelerator pump.
Please notice that the secondary pullover enrichment system has been modified to give a much better response when you go to wide open throttle.  The pic shows the larger ports and the way Thomas used an exclusive feature to activate the system when the secondary valves just started to open.  No bogs or lags - just pure fast power response.
The APT (adjustable part throttle) screw is accessible without removing the air horn.  Remove the set screw and use a small screwdriver to raise or lower the jets to adjust the off-idle and cruise to suit your engine.  You can adjust the APT even while the engine is running.
Selling as used, but it is in perfect shape and ready to bolt on.  No disappointments.