Rear Bumper Brackets

[jasinger01]

Originally Posted by pjmoreland

Take a look at post #240 in 71CHEVYSHORTBED402's build thread. He lists how much each hole needs to be moved in the bumper brackets.

http://67-72chevytrucks.com/vboard/s...730025&page=10

Thank you! I did come across his thread in my searches. I need to pull my brackets back off and measure to see which bracket I started with.

Originally Posted by 71CHEVYSHORTBED402

From my angle and best guess, the bumper mounts (literally) approx. 8" from the frame rails.

My sport bumper's top is 8/10” behind the bed’s body, located below the tail lamp bezels, and 4/10” below each tail lamps bezel phillips screw center. That's a guide only, I had to modify the brackets shown in the OP to fit the frame rails, and slotted the bracket bolt holes to allow for small adjustment.

My frame rails in a 2WD, SWB, with leafs has a 5.3" bolt pattern for the brackets. Most rails are 5" or 7.1", IMO. My brackets are not reproduced, and I wouldn't want reproductions anyway.

Is your truck 2 or 4wd?

Thanks for chiming in! It is a GMC 2wd SWB with leafs. I will measure from the back of the frame rail to the bumper mounting surface. These brackets looked like they came originally with the truck, since they mounted up easily, I will have to measure if they are 5.3" bolt pattern or if they just got slotted at some point in their life.

If they are the 5" 'coil' style brackets, I'm concerned that the modification to slot or re-drill 3/10" toward the rear will still not bring the bumper in close enough.

Will take some measurements/pictures this week. Thank you for the help

[71CHEVYSHORTBED402]

Originally Posted by jasinger01

Thank you! I did come across his thread in my searches. I need to pull my brackets back off and measure to see which bracket I started with.



Thanks for chiming in! It is a GMC 2wd SWB with leafs. I will measure from the back of the frame rail to the bumper mounting surface. These brackets looked like they came originally with the truck, since they mounted up easily, I will have to measure if they are 5.3" bolt pattern or if they just got slotted at some point in their life.

If they are the 5" 'coil' style brackets, I'm concerned that the modification to slot or re-drill 3/10" toward the rear will still not bring the bumper in close enough.

Will take some measurements/pictures this week. Thank you for the help

Very cool. Fun how vendors suggest their replacement long inner brackets fit that pattern, they're not remotely close. The short ones are closer.

They don't reproduce inner or outer brackets for the 5.3" pattern. The mystery is contributed by 2WD, SWB with leaf springs trucks are so rare. Good luck finding a pair, but very cool if you have the right ones. If you don't.....