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Old 01-25-2017, 10:09 AM   #1
KQQL IT
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Tank fill size

I need a new right side fuel tank for my '73.
When did GM start the 2'' fill neck?
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Old 01-28-2017, 03:54 AM   #2
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Re: Tank fill size

Anyone?
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Old 01-28-2017, 08:05 AM   #3
cadillac_al
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Re: Tank fill size

I thought they were all the same. If 73 had a different fill neck it should be easy to swap in a 76 or newer one.
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Old 01-28-2017, 11:20 AM   #4
tucsonjwt
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Re: Tank fill size

I think it changed in 1979, based on the LMC catalog. You can find filler necks on Ebay if the LMC price is too high for you.

http://www.lmctruck.com/icatalog/cc/full.aspx?Page=49
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Old 01-28-2017, 12:11 PM   #5
KQQL IT
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Re: Tank fill size

I need a new tank.
I know like 82 and up are 2'' and my 73 is 1.5'' I'm trying order the right one.
The fill neck is 2'' already and in the bed floor and a major pos to fill with the 2'' to 1.5 reducer
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