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09-29-2009, 07:06 PM
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#1 |
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Registered User
Join Date: Jun 2009
Location: Escondido, CA
Posts: 25
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fuel pump
So I just swapped out the straight six for a 350 in my 81' swb and everything went amazingly smooth. I go to hook up the fuel line to the 350 and notice two inlets on the fuel pump. My six only had one fuel inlet on the fuel pump and I only have one fuel line coming from the tank. Any ideas how to deal with this?
Thanks
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1981 C10 SWB 350 (in progress) 3 on the Tree "Old Bess" 1996 K3500 Crew Cab 454 4L80E "Family Camper" 2002 GMC 1500 Yukon XL 4WD "Wife's Ride" |
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09-29-2009, 07:12 PM
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#2 |
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1962 C-10
Join Date: Apr 2005
Location: Las Vegas, New Mexico
Posts: 4,978
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Re: fuel pump
Try an older fuel pump. The one on my 62 only has one inlet and one outlet. Ask for one from the 60's.
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Joseph Chavez  "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4 |
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09-29-2009, 07:26 PM
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#3 |
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Next project: 1970 K10
Join Date: Feb 2004
Location: Fort Collins, Colo 80524
Posts: 6,685
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Re: fuel pump
Could the extra be a return line? Just get a small block fuel pump without a return, 67-72 for example.
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Bob 1970 Chevy K10 LWB "Goldie" 350/TH350 next project!! 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE |
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09-29-2009, 11:43 PM
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#4 |
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Registered User
Join Date: Jun 2009
Location: Escondido, CA
Posts: 25
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Re: fuel pump
The second inlet was in fact a return, so I just plugged it.
Thanks for the input!
__________________
1981 C10 SWB 350 (in progress) 3 on the Tree "Old Bess" 1996 K3500 Crew Cab 454 4L80E "Family Camper" 2002 GMC 1500 Yukon XL 4WD "Wife's Ride" |
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09-30-2009, 08:37 AM
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#5 |
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Still plays with trucks
Join Date: Jul 2009
Location: Spokane, WA
Posts: 3,556
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Re: fuel pump
Had the same problem on a Chevelle. I plugged it and everything worked fine.
I think it may be a vapor return line. My 78 K20 truck does not have one on it so when you have to replace the pump down the road ask for one from a 78. |
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09-30-2009, 10:10 AM
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#6 |
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Registered User
Join Date: Jul 2009
Location: Rockvale,Tn
Posts: 44
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Re: fuel pump
The smaller is a return line to prevent vapor locking.
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09-30-2009, 02:17 PM
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#7 |
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Registered User
Join Date: Jun 2009
Location: Escondido, CA
Posts: 25
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Re: fuel pump
Thanks again, I will run with it plugged until I need another. I am still amazed at how easy it was to pull the old straight six and drop in a 350. The only thing I had to do was move the motor mounts up to the pre-existing holes above and get a new radiator with radiator shroud and lengthen 3 wires from the pre-existing wiring harness!
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1981 C10 SWB 350 (in progress) 3 on the Tree "Old Bess" 1996 K3500 Crew Cab 454 4L80E "Family Camper" 2002 GMC 1500 Yukon XL 4WD "Wife's Ride" |
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