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Old 05-09-2024, 03:35 PM   #1
1971Stepside
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Ever bought a donut?

Never throw anything away when taking a truck apart that you intend to put back together later...well, I broke that rule and I am now paying for it.

1985 GMC C2500 350 with factory true dual exhaust 2.5". I swapped the whole truck over to a GMC SWB 1/2 ton frame and somehow pitched the factory exhaust donut gaskets. Now, I'm having a real hard time finding the correct ones to put it back together.

Anyone have any idea what the donut gasket part number might be for this set up? I guess the factory duals make it a rare bird because the parts books don't show something that fits. Running the stock A.I.R. equipped manifolds and down pipes.
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1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021.

"I can't complain, but sometimes I still do. Life's been good to me so far."
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Old 05-09-2024, 09:34 PM   #2
franken
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Re: Ever bought a donut?

https://www.67-72chevytrucks.com/vbo...d.php?t=550014
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Old 05-10-2024, 10:56 AM   #3
1971Stepside
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Re: Ever bought a donut?

appreciate the link, but it does not help me at all.
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1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021.

"I can't complain, but sometimes I still do. Life's been good to me so far."
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Old 05-10-2024, 12:46 PM   #4
JJH Jimmy
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Re: Ever bought a donut?

https://www.walkerexhaust.com/conten...%20Flanges.pdf
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1972 GMC Jimmy 4x4 LS Swap
1985 Chevy K20
1994 GMC Yukon
2021 GMC 2500HD Duramax AT4

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http://67-72chevytrucks.com/vboard/s...d.php?t=801565
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