fuel sending unit - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dzbowtie · 04-14-2011, 12:56 AM

i have a 70 c10 that was originally an inline 6 truck. i have since switched out the 6 for a small block. the fuel sending unit needs to be replaced. question is, do i have to use an original unit for a 6 for accurate reading, or can i just get a unit for a v8 and install.

dmack91 · 04-14-2011, 01:10 AM

My understanding is that the sending unit is the same, it is the fuel line coming out of it that is different. I think the the I6 is 5/16" where the V8 is 3/8".

I am sure those who know more will chime in.

Sammy · 04-14-2011, 08:44 AM

Fuel line size and the connection is the only differences. In 69 I know the V-8 307 2 barrel carb fuel sender unit came with the smaller line also as stock. Since then I replaced the carb with a 4 barrel, I have had no starving fuel issues for several years. Doubtful unless you are running dual carbs you would have a issue with fuel starvation in a stock setup.

**Classic Heartbeat** · 04-14-2011, 12:37 PM

The only difference is the size of the tube. If you install one from a V-8 then either you will have to find 1/4" an adapter, or change the fuel line going through the floor of the truck. WES

04-14-2011, 12:56 AM	#1
dzbowtie Registered User Join Date: Jun 2010 Location: Clarksville, Tn Posts: 142	fuel sending unit i have a 70 c10 that was originally an inline 6 truck. i have since switched out the 6 for a small block. the fuel sending unit needs to be replaced. question is, do i have to use an original unit for a 6 for accurate reading, or can i just get a unit for a v8 and install. __________________

04-14-2011, 01:10 AM	#2
dmack91 Registered User Join Date: Jan 2011 Location: Redmond, OR Posts: 755	Re: fuel sending unit My understanding is that the sending unit is the same, it is the fuel line coming out of it that is different. I think the the I6 is 5/16" where the V8 is 3/8". I am sure those who know more will chime in. __________________ 68 Chev C20- son has it now 83 K20 - bought from son 70 C20 - in progress

04-14-2011, 08:44 AM	#3
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: fuel sending unit Fuel line size and the connection is the only differences. In 69 I know the V-8 307 2 barrel carb fuel sender unit came with the smaller line also as stock. Since then I replaced the carb with a 4 barrel, I have had no starving fuel issues for several years. Doubtful unless you are running dual carbs you would have a issue with fuel starvation in a stock setup. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"

04-14-2011, 12:37 PM	#4
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,770	Re: fuel sending unit The only difference is the size of the tube. If you install one from a V-8 then either you will have to find 1/4" an adapter, or change the fuel line going through the floor of the truck. WES __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys



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