Filler neck components

dandersen

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Dane
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78, 79, 84
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c10
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I have a 83 or 84 bed, and I have a 78 frame and fuel tank. Which filler neck would I need? 73-78 or 79-89
 

dandersen

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Dane
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78, 79, 84
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c10
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350
The round headlights didn't have fuel doors? I thought they didn't but I wasn't sure.
 

Dixie Pride

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Just finished a bed off restro on my 85 K20 i have had since new. When i replaced the gas tanks and filler hoses i could not find the both pieces online from say LMC trucks. I ordered Stainless Steel bent piping and made my own. They will never rust out again.Fit good too.Dont forget the ID and OD if you go this route. Hope this helps
 

94_6SpeedZ

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Greg
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1976
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I just went through this puzzle a year ago....

I have a 76 (16 GAL tank) and a newer bed with a fuel door. (Not sure what year bed as the truck was in pieces when I got it). The filler opening on the bed will tell you if it's a 79-83 or 84-87. LMC catalog is helpful with pictures. I have a 79-83 bed. The size of the filler hose also changed in those years. 73-81 had a smaller size than 82-87.

So, similar to your situation. I needed a fuel filler pipe for a 79-83 and a fuel filler hose for a 79-81. That would be correct if you have the 79-83 bed. If it's an 84-87 bed, you may have to adapt from the smaller diameter fill hose to fit the larger size filler pipe.
 
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matt4426

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NE Ohio
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Matt
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79
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K35
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454
You need the correct filler neck and brackets/hardware for what ever year bed you have. I would get an 80's style fuel tank with the larger fuel fill port to got along with the 84 filler neck. As previously noted above, LMC has nice pictures of the different filler necks and bed brackets/hardware
 

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