'70 C10 no shoulder belt mounts?

[Lniles]

Hi all,

I am the new owner of a '70 C10 project. It's a short fleetside w/ 396 BBC. It took two weeks to get it running; I imagine a build thread is in order.

At present there are no seat belts whatsoever, so it's time to put in a retractable 3pt. Unfortunately, I cannot locate the shoulder trap mount I expected to be there. I am not aware of any runs GM made without at least the hole punched in, so perhaps a PO somewhere along the line filled this in? I can't see anyone wanting to do that; moreover everything appears to be all metal.

Does anyone have measurements to locate where this hole should be? Maybe I can get lucky and be able to uncover the hole can clean up the threads?

Thanks,
Lance