Gas Tank supports, what do these fit?

[DanMcG]

I bought used tank supports years ago for my 85 K10 and now that I need them, I find out the bolt pattern is wrong. Any idea what these fit so I can get rid of them?
I've got one coming from AMD that appears in the pictures to match mine.
This is the shorter front support

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[DanMcG]

What, Nobody wants to take a guess? researching seems to point to all squares use the same one. (not this one) but I see some aftermarket supports have the weldnuts for this bolt pattern and also the square body pattern, 8 weldnuts total.
What do they go on?

 

[gilby959798]

I think that is the passenger side front bracket

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[fast 99]

are you sure they are GM other manufacturers also had saddle tanks

 

[DanMcG]

No I'm not sure, but they were sold as GM.
The rear ones that came with the set bolt on and look to be right.

 

[DanMcG]

for reference, here's a pic from AMD's website of the one I ordered.
the pairs of weldnuts are both offset in both directions and the brackets I have the top pair are inline with each other.

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[DanMcG]

are you sure they are GM other manufacturers also had saddle tanks

Looks like Ford and Dodge used strap hangers in that era.

 

[gilby959798]

For instance, this is a zoomed in pic of the front driver side bracket, the passenger side would be different to match the bend in the frame, similar to your first pic.

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[bucket]

They are the same brackets for each side of the truck, but GM only attached the weld nuts to the holes that were needed for a given side.

You can sneak nuts up in there and use them, you can weld nuts to them and use them, or you can buy new brackets that have the nuts welded on where you need them.

 

[DanMcG]

well I ordered a new one so these two front supports are no use to me. But would be nice to know what they came off of.

 

[DanMcG]

For instance, this is a zoomed in pic of the front driver side bracket, the passenger side would be different to match the bend in the frame, similar to your first pic.

Thanks for the help gilby, If I try to line the top to holes up the center to center is not the same and the plane of the bracket wouldn't match the rear bracket.

 

[gilby959798]

Thanks for the help gilby, If I try to line the top to holes up the center to center is not the same and the plane of the bracket wouldn't match the rear bracket.

Correct, do the the bend in the frame the front bracket is shorter than the rears.

 

[bucket]

well I ordered a new one so these two front supports are no use to me. But would be nice to know what they came off of.

They are squarebody tank brackets.

 

[DanMcG]

They are squarebody tank brackets.

I agree with ya but the bolt pattern doesn't match what I have on my truck.
If you look at my original pic there are 2 small holes drilled above and below the top weld nuts...that's where I'd have to drill it out to line up with my frame holes. I forgot all about drilling them out, I've had them for while.

 

[bucket]

I agree with ya but the bolt pattern doesn't match what I have on my truck.
If you look at my original pic there are 2 small holes drilled above and below the top weld nuts...that's where I'd have to drill it out to line up with my frame holes. I forgot all about drilling them out, I've had them for while.

I see what you are talking about now. Could be a difference in the year of production, or maybe the taller 1-ton frames have that different bolt pattern at the top. Not sure about that. But they are definitely squarebody tank brackets.