? on modification of factory fuel sending unit - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rattleon · 12-12-2009, 04:34 PM

I relocated/changed the cab mounted fuel tank in my '70 short/step to the rear behind the diff. as many do with the blazer style tank. I'm using the factory sending unit/fuel pickup assembly I got with the kit. I like the tank application, but it only has what appears to be a 5/16" pickup tube for the fuel..... My question is has anyone out there ever modified, or changed the pickup tube in one of these factory sending units to 3/8" or 1/2", or is there any other options short of a fuel cell? It needs to feed a 460 BB chevy with 750 holley or bigger carb. and when I mash the pedal I don't want to starve it for fuel, especially at the beginning of the system. Easier to fix now, not later!

Thanks for any input

**LockDoc** · 12-12-2009, 09:22 PM

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That sending unit looks identical to the 67-72 units (except for the hose connection) but I'm not sure about the length. If it's the same length you can get a new sender with the 3/8" tube.

LockDoc

Longhorn Man · 12-13-2009, 11:19 AM

if that is a blazer tank, then you need a blazer sending unit for a v8 blazer... they came stock with a 3/8. Get a 60/70 if you don't want a return line.

12-12-2009, 04:34 PM	#1
rattleon Registered User Join Date: Oct 2009 Location: Idaho Posts: 44	? on modification of factory fuel sending unit I relocated/changed the cab mounted fuel tank in my '70 short/step to the rear behind the diff. as many do with the blazer style tank. I'm using the factory sending unit/fuel pickup assembly I got with the kit. I like the tank application, but it only has what appears to be a 5/16" pickup tube for the fuel..... My question is has anyone out there ever modified, or changed the pickup tube in one of these factory sending units to 3/8" or 1/2", or is there any other options short of a fuel cell? It needs to feed a 460 BB chevy with 750 holley or bigger carb. and when I mash the pedal I don't want to starve it for fuel, especially at the beginning of the system. Easier to fix now, not later! Thanks for any input Attached Images __________________ 1970 c-10 short/step box morphing into street/strip 1967 RS/SS convertible Camaro 1932 Henry Ford steel 5 window coupe highboy hotrod 1931 full fendered model A sedan AV8 traditional hotrod. 1934 Ford 5 window coupe and a (pile-of-parts) 1929 Model A coupe, plus our "normal" people vehicles.

12-12-2009, 09:22 PM	#2
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,647	Re: ? on modification of factory fuel sending unit - That sending unit looks identical to the 67-72 units (except for the hose connection) but I'm not sure about the length. If it's the same length you can get a new sender with the 3/8" tube. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

12-13-2009, 11:19 AM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: ? on modification of factory fuel sending unit if that is a blazer tank, then you need a blazer sending unit for a v8 blazer... they came stock with a 3/8. Get a 60/70 if you don't want a return line.



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