Paul,

Here is some information about the Holley mixture control kit.  It is best
suited for a two barrel 350 or 500 CFM Holley carburetor.  However, the unit
has been successfully used on large four barrel carburetors.  The mixture
control WILL NOT fit other makes and models of carburetors!  The unit
replaces the fixed main jets with a rotating valve that is remotely operated
by a push pull cable.  The unit will go from total idle cut-off to overly
rich by rotating the shaft, while the engine is running.  Installation is
very simple with step by step instructions provided.

Due to the outrageous cost of materials and the inflationary state of our
economy,the price of the kit has recently been raised to $150.00.

The mixture control body is CNC machined from 6061-T6 aluminum which is
alodine treated, the shaft is stainless steel and the screws are plated
steel.

The first picture is what comes in the kit. The mixture control plate is in
the background with the accelerator pump extension arm., power valve block
off plug, and installation bolts in the foreground.  I also include a set of
three gaskets which are not shown.

  The second picture is a unit installed on a 4 barrel Holley carburetor.
The installer is responsible for the push-pull cables and attachment
hardware.  As you can see, the unit is installed in-between the jet plate
and the float bowl.  This requires the use of longer float bowl bolts which
are included in the kit.  The arm swings thru 90 degrees of rotation from
idle cut-off to full rich. The arm can be clocked anywhere on the shaft to
make installation easier.  The arm in the photo is in the full rich position
and idle cut-off would be in the 4 oclock position. Two shafts are avialable
to make full rich either in the clockwise rotation or counter-clockwise
rotation.  This sometimes simplifies the push-pull cable installation.  I
usually ship the counter-clockwise to full rich shaft, as this parallels the
throttle rotation on the opposite side of the carburetor.

If you have any questions please e-mail.

Thanks

Tom McNeilly <tomcn@earthlink.net>

Thanks Tom.
That is just about perfect for our needs as we advocate the 500 CFM.

Paul Lamar

   Hey, that looks really good. Great find! If you don't mind my asking, who
produces that block? Interesting that the price has risen to $150 as Percy's
and another one (can't remember the name) are stll at the $80-90 mark. In any
case, full rich to full lean in a quarter of a turn sure beats the thirteen
turns required by Percy's.

Vlad