Just received holly efi fuel pump

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Treyh7042

Not-quite-so-new-guy
Jan 18, 2021
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Laurens SC
1978-88 GM Cars EFI Fuel Tank Modules Pump Sending Unit Holley 255 LPH OE Style
Boy this build is starting to come together
 

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Streetbu

Know it all, that doesn't
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May 22, 2011
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Working great for me. Not sure why more people don't use it.
 
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doood

Amateur Mechanic
Sep 24, 2020
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I used this, and it took me about 90-minutes to convert a carbureted car to EFI. Used Earl's vapor-lock hose rated to 200psi to the factory hardline and fuel rail, cheap hose to the vent, and double-clamped it down with best hose clamps I could buy. Napa fuel filter, Marshall fuel pressure gage nested up between the valve covers and intake manifold.
 
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motorheadmike

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Nov 18, 2009
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81cutlass

Comic Book Super Hero
Feb 16, 2009
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Working great for me. Not sure why more people don't use it.

Is there any difference between this and a GN hanger with any pump of your choice?

I was hoping to see that this has threaded fittings on the supply side or something that makes connecting fittings more friendly.
 
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L92 OLDS

Comic Book Super Hero
Mar 30, 2012
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Is there any difference between this and a GN hanger with any pump of your choice?

I was hoping to see that this has threaded fittings on the supply side or something that makes connecting fittings more friendly.
Agreed. Why do suppliers continue to only provide the crappy stock rubber hose / hose clamp option?

Best case scenario would be the male side to a standard fuel line fitting as shown below. Not threads for overpriced AN fittings with braided line.

1634043843972.jpeg
 
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Streetbu

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May 22, 2011
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Central NY
Agreed. Why do suppliers continue to only provide the crappy stock rubber hose / hose clamp option.
Best case scenario would be a standard fuel line fitting as shown below. Not threads for overpriced AN fittings with braided line.

View attachment 185352
I used a stainless steel Swagelok fitting to go onto the sender and convert to AN thread. Same on body side fuel line. Those are good for 5000 psi IIRC.

UA-2.jpg
 
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Streetbu

Know it all, that doesn't
Supporting Member
May 22, 2011
3,721
11,525
113
Central NY
Is there any difference between this and a GN hanger with any pump of your choice?

I was hoping to see that this has threaded fittings on the supply side or something that makes connecting fittings more friendly.
If you can find a 4.3L fuel injected Monte, they have threaded fittings on the sending unit. I still have one if you're interested.
 
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