Holley Pro-Jection

 

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    After fighting with Carb tuning for almost a year, I purchased a Holley Pro-Jection system to replace the Carb and Single Plane manifold I had on the 327.  Unfortunately, I didn't take pictures of this either before I removed it, but I hope that the text will help with any questions.

    The installation of the Holley Pro-Jection system was pretty straightforward.  The directions from Holley were good, and the install went find.  I purchased it along with a dual plane manifold in since I was convinced that was part of my problems with the Carb.  The most difficult part of the Projection install was the fuel line routing.  In my truck, I paid a third party to modify my fuel sender to include a second fuel port for the return line.  After seeing what they did, I wound up doing a similar method on my brother's truck, which I think turned out much better.  On my brother's truck, we had drilled a hole into the fuel filler tube, which worked all right, but it wasn't as clean as modifying the fuel level sender.

    Routing the fuel lines was something that I never liked the result of.  A prime disappointment in the system was Holley's use of barbed fittings for rubber hoses, instead of stock systems which generally use hard line, and screw on fittings.  The rubber lines at the back of the throttle body leaked from day one, but never bad enough for me to really dig into the problem.  However, this is a much simpler install than the stock type fittings, since you have to be much more precise with the hose construction and bending of the pipes.  One thing that helped a lot in my install was the use of aluminum fuel line.  I can't remember why I purchased it instead of steel, but the aluminum line bent much more easily, and was more resistant to kinking.  The final installation, although it leaked slightly, lasted for 4 years, until the next big upgrade.  The following is a cost list:

 

Item                                                                                Price

Holley Pro-Jection System                                          $600

Holley Closed Loop Kit                                                $164

Modified fuel level sender                                              $35

Holley Pro-Jection Manifold                                         $166

 

                                                        Total                        $965