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Old 11-30-2011, 11:41 AM   #1
69heavychevy
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Join Date: Jan 2007
Location: Garland,TX
Posts: 431
Need help with ID part

I was wondering what the part circled in red is called and what purpose does it serve?
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80 C10 SWB Step Side - 350 w/ vortec heads, TH350, 12-bolt 3.73
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