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  Overview:   

Since I decided to go carbureted rather than fuel injected there were several options to be considered and details to be sorted out.                   

Carburetor:   Holley 4010 (600 cfm).  Double pumper with  mechanical secondaries.   Summit dual feed line with integrated fuel filter and fuel pressure gage.       
Fuel Pump:  Holley "Red" external pump  (97 GPH free flow  - 67 GPH at 5PSI).   Mounted on passenger side on 2"x3" vertical tube.   Pump is as low as possible to ensure an easy gravity feed.   This location also allows easy access.      

Notes:

1) Since I went with a low pressure pump (factory preset at 7 PSI), a fuel pressure regulator and fuel return line is not required. 

2) Although not necessary for low fuel pressure applications like mine, I will add a fuel safety switch that will stop fuel flow in case of a rollover and ensure that the pump will not continue to operate after the engine is off and/or the key is left in the "on" position.      

Fuel Tank:   Installed a new tank from Spectra Premium (F12-A).   Used a rubber vacuum fitting (found in most auto stores) to plug the tank fuel return line.  Ran a braided stainless fuel line from the tank --> fuel pump --> carburetor.   Bought a tank seal and check valve from Breeze to vent the tank. 

Note:  I will add a rubber line to the check valve to vent fuel vapor away from the undercarriage.          

Fuel Tank:   The problem with the Spectra Premium (F12-A) is that it did not have a separate hole for the fuel sender....only the F12-B has the extra hole.    No problem..... I bought a new sender from Classic Instruments and as you will see below,  cut my own hole.  

Note:  So one might ask what good a F12-A is without a fuel sender hole?  Apparently some earlier model Mustangs had the fuel sender, fuel pickup and fuel return integrated into one unit.        

 

Fuel Tank:   Cut a hole as specified by Classic using one of my Milwaukee metal hole saws.   Placed hole in the deepest part of tank.  Vacuumed thoroughly and then installed the sender. 

Note:  I would not have done this if this tank had fuel in it for fear that I might not be able to remove the stray cuttings....but since the tank was new (and had never seen fuel) it was straight forward. 

 

    

 

Fuel Tank:   I bench tested the new sender by hooking it up to a  battery & the fuel gage...... verified that:

1) it worked

2) float at bottom = empty

3) float at top = full

 ** Good thing I bench tested as I initially had it reading backwards.     

 

 
I can be reached directly at the Legacy Garage at:  klegacy@comcast.net (SR71 on FFCobra.com)
Last modified: Sept 1, 2009