has anyone put 03 silverado seats in a 73-87 chevy?

[Hulk Will Smash]

They used flat stock across the floor. The front outside and rear inside bolts go through the seat bracket and the floor, the the opposites go through the bar stock. The bar stock is bolted through the floor in several places as well. Fortunately I sold my apple cart years ago...

And it's a crew cab so the tanks didn't need to come out for the fronts, but that's a fight I'm going to have when I finish mounting the back seat.