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Discussion Starter #1
my fuel pump has a 5/16" hardline outlet and my (4160) carb
has a 3/8" fitting for in. do i just run 5/16" to the carb and
adapt it, or run 3/8" and adapt at the pump?

my stock car's fuel line from tank to pump is 5/16" and i'm in
no mood to plumb new fuel line until i go EFI.

thanks once again : )
 

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5/16 line is fine.

I ran 5/16 hardline from the tank to the($20;) 1969 351W 4bbl 300 hp )fuel pump.I the used a length of the plastic EFI line that was 5/16.I used a short rubber hose to connect the pump to the plastic line, and the ran it to the 3/8 fitting at the carb.I used another short 5/16 rubber hose to connect the 5/16 line to the 3/8 fitting.I made the rubber 5/16 line go on.Just adapt it at the carb.

FWIW... I have over 300 fwhp out of my 302 with a $50 fuel system.Had plenty of fuel on the dyno,the valvesprings gave up before the fuel pump.:evil:
 

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Discussion Starter #3
the thing is, i happen to have both sizes of fuel line and
fittings. i always have loads of random bits in my garage.
is it worth it to have that little extra reservoir the 3/8" line
might provide?
 

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There should be a filter between the pump and the carb. If I recall correctly, the filter is 3/8 on one side, and 5/16 on the other.

If the correct filter isn't like this, just find one that is at the parts store.
 

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Discussion Starter #5
hmm, alrighty. i was going to put a filter between fuel tank and
pump actually since the pump inlet is 3/8" and the fuel line
to the tank is 5/16" so i knew i had to adapt anyway. i'll look
around at el parts storo tomorrow.
 
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