Longbed mounting hole placement

[GR8-68]

Originally Posted by FL71C10

I am installing new bed wood in my longbed fleetside tomorrow morning. I can make some notes and take some pictures for you. I think there is a reason all of the kits come with those holes not drilled. Your bed cross sills don't have to be off by much to cause these holes not to line up.

That would be great thank you. They should not be off much from one to the other plus you can spin the offset washer to change the alignment of the hole. I drilled all of mine according to the gmc pauls website for my shortbed and it worked out perfect. I appreciate your help

[AussieinNC]

According to some research on Chevrolet archives, the bed location holes were not drilled at the factory until the bed was aligned on the chassis, then the mounting holes were drilled from below thru the mounts...

There are so many variables involved, how and where the wood planks originated from and the drying treatment etc, the mounts themselves on the chassis etc

I would really value your measurements from your install process tomorrow, as I will be undertaking this on my own long bed this fall.

As always, pics are best...plus detailed measurements..edn of board to center of each hole, distance in from rebate edge, etc

Have a great day...

[AussieinNC]

The shortbed drawing above does also show a 3/4" hole thru the bed plank, and the bolt is spec'd at 1/2", giving you a little play room, plus room for the expansion factors of the wood plank due to weather etc...

[Old_Gold]

I assembled mine, marked the boards from below, then drilled and counterbored , finished, etc
If you think center points would be close enough, i could get some dimensions tomorrow.

[GR8-68]

Originally Posted by Old_Gold

I assembled mine, marked the boards from below, then drilled and counterbored , finished, etc
If you think center points would be close enough, i could get some dimensions tomorrow.

That is what I need is the center points thanks for any help you can provide

[AussieinNC]

Check your IM and email...I sent you the measurements off of my truck...

[FL71C10]

I put my boards in today. I definitely dont think you want my measurements, My boards seem too narrow, so the gaps between them are too wide.