Sub's - 3rd seat with no factory mounts

[884x4Sub]

anyone ever do this?.....I have the seat but the truck has no factory mounts on the floor......I was thinking about welding some 3/8 nuts to the floor, cutting the factory mounts off the seat, welding small pieces of flat 1/4" plate on the bottom of the seat, drilling holes in the plate and bolting the seat down in 4 places....put the nuts in the bottom of the channels in the floor to not interfere with sliding things on the floor too much......whattaya think.