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