Rear Bumper Bolt Pattern Thread - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**71CHEVYSHORTBED402** · 03-10-2019, 01:33 PM

Yet another rear bumper thread. New things come up. Hopefully this one serves as an education. The more

's and

's chime in the better.

For those with factory 1967-72 rear bumper bolt patterns, can you measure the bolt pattern on your frame rail? That and can you provide the:

Year
Model
2wd or 4wd
LWB or SWB
Coil Spring or Leaf Spring
Factory bumper

The bolt pattern on my 71 C-10, 2WD, SWB, leaf spring

is 5.3/10". It had a factory step bumper. A bumper isn't installed, so a paint stick made it easy to measure the frame.

The pattern on my 72 C-20, 2WD, LWB, leaf spring is 5". Factory step bumper. The rearmost hole isn't as far back on the frame rail as that on my C-10.

03-10-2019, 01:33 PM	#1
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,120	Rear Bumper Bolt Pattern Thread Yet another rear bumper thread. New things come up. Hopefully this one serves as an education. The more 's and 's chime in the better. For those with factory 1967-72 rear bumper bolt patterns, can you measure the bolt pattern on your frame rail? That and can you provide the: Year Model 2wd or 4wd LWB or SWB Coil Spring or Leaf Spring Factory bumper The bolt pattern on my 71 C-10, 2WD, SWB, leaf spring is 5.3/10". It had a factory step bumper. A bumper isn't installed, so a paint stick made it easy to measure the frame. The pattern on my 72 C-20, 2WD, LWB, leaf spring is 5". Factory step bumper. The rearmost hole isn't as far back on the frame rail as that on my C-10. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 03-11-2019 at 05:35 PM. Reason: Corrected with new information.



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