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Old 01-20-2024, 04:02 AM   #2
Richard
Senior Member
 
Join Date: Dec 1999
Location: Southern California
Posts: 2,735
Re: Help. 1971 C10 4x4. What is the bar under the front differential?

Not a C10 but a K10 (4x4) If vin points to C10 it is a put together truck. That is called an axle truss. It meant to reinforce the axle and prevent bending of the axle tubes. Yours looks a little bent on the drivers side. Hard to tell but also looks to be somewhat of a custom job as the end mounts appear to be welded to the axle tube.
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Richard
1972 K10 Custom Deluxe SWB Fleetside
My build https://67-72chevytrucks.com/vboard/...d.php?t=800746
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