6066 (1960-1966) GMC Truck Club - 5/16ths or 3/8ths fuel line

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Jakehaney

September 26th, 2021 08:55 PM

5/16ths or 3/8ths fuel line

I know it’s kind of a stupid question but did the 1966 1/2 ton pickup with the 250 I6 use 5/16th or 3/8th line? I stuck a 5/16ths wrench around the OD of my fuel lines and it was snug. Is it safe to say I have 5/16ths?

Funky61

September 27th, 2021 04:37 PM

Re: 5/16ths or 3/8ths fuel line

Sounds logical to me Jakehaney

Prowbar

September 30th, 2021 07:06 AM

Re: 5/16ths or 3/8ths fuel line

My 65 3/4 ton has 5/16" lines.

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