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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Jan 2000 Posts: 2,074 'Bolter | | 'Bolter Joined: Jan 2000 Posts: 2,074 | Need ideas on best mounting location for my lap belts. Have anchor plates but thinking I still may need to beef up floor under seat? Thanks
| | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | Check my picture album in signature for 51 GMC. Believe I have detailed pictures of that process and they fit and work nicely.
Cutting holes for the straps in the seat frame is key to good belt routing in the AD trucks.
I’d use shoulder belts if/when I do it again, lower locations stay same. | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | Here's the write up on installing my seat belts, with the pictures. https://www.stovebolt.com/ubbthread...ve-improve-drive-repeat.html#Post1162006The mounting locations I chose have significant structure around them, so use the large washer or nut plate on the bottom as supplied with the belts and should be plenty secure. Again, may as well use shoulder belt. Same details for the bottom mounting points plus one at your preferred height in the door pillar. | | | | | Joined: Jan 2000 Posts: 2,074 'Bolter | | 'Bolter Joined: Jan 2000 Posts: 2,074 | Thanks Grigg for the great detailed photos. The belts I have are pretty long so I'm thinking of bolting these directly to the rear of the under seat panel then fish the belts up and around seat cushion. Or I might be able to go between seat frame and the gas tank?
Wish I'd seen the retractable belts before I bought these. Also have some seat belt retractors that will roll up the outboard belts when not in use vs falling off the seat.
| | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | You can use the same mounting locations I used with plain strap belts.
If you think about how a seat belt should work you don't want it passing in and back around and under stuff, they should be pretty much straight line to your lap.
The locations I chose allow that as best you can do in an AD truck, in my opinion.
I felt that mounting the center ones to the cab floor right close to the seat riser, large washer underneath, was stronger than bolting to the seat riser alone. (also don't have to remove gas tank to bolt them in)
Whatever you do Install them as safely as possible to suit yourself.
| | | | | Joined: Feb 2016 Posts: 148 'Bolter | | 'Bolter Joined: Feb 2016 Posts: 148 | Here's the write up on installing my seat belts, with the pictures. https://www.stovebolt.com/ubbthread...ve-improve-drive-repeat.html#Post1162006The mounting locations I chose have significant structure around them, so use the large washer or nut plate on the bottom as supplied with the belts and should be plenty secure. Again, may as well use shoulder belt. Same details for the bottom mounting points plus one at your preferred height in the door pillar. Thank you Grigg for taking the time to create the thread in the link above! David
Last edited by DavidBraley; 10/18/2018 7:46 PM.
-David
1953 2-Ton GMC
I'm a machinist... because engineers need heroes too.
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