I am Not talking about Mounting Any Seat to Just The sheet metal Floor board!
and Never was I Implying to take any Loose Seat belts and Bolting them Or welding them to say a Stock Seat (Never Would I Do That)if the seat (Belts)Are Loose and you are going to Mount them to the Floor, YES they need to go into the stock mounting Locations and if not they need to be Fully secured ie;welding in washers
gusseted, plated and what have you to make them FULLY secured to the floor and NOT
the Seat.
NOW, if you are going to Say Mount a new different seat into an old truck Yes the seat needs to be Fully secured to the floor and not just Bolted down to the sheet metal.
My I add with grade 8 Bolts too!
As for the newer SEATS with the Seat belts Bilt into Them,the ones i Have seen Mounted into the older trucks have Factory Mounts Fully strengthend, Fully Gusseted mounting
attachment Points to the seat FRAME. Iam Talking about a Three Point System were
it crosses your Lap and then attaches to the Piller (which needs to be Fully secured from Behind the pillar and Not Just Bolted to the sheet metal )for your shoulder restraint.
Then this new Seat needs to be Mounted securly to the cabs floor.
The seats that I have seen, with belts mounted to the frame would take the same brute force of the incredible Hulk to Rip out, I truly believe! The same force required to pull the
belts that are securly mounted to the floor.
I was also talking with an Engineer friend of mine and he said that he had read an article on why auto manufactures have made the seats with belts attached to the frames
and it said that (And I am Only quoteing what he said the article said)is that it was thought to be Safer in that if you were in a crash you were scured to the seat and hold
you say more Firmly than a person in a seat that does not, and upon an Impact the seat gets push in one direction and you being pushed in another,It Kind of makes sence to me, But I will Let you make your own decision on that one!