Dually Bed Repair

[nelsonadam84]

I got a 1985 Chevy C30 3+3 and the previous owner had cut the area out between the wheel wells to put in a goose neck hitch. I am wanting to put the area back in. I have got parts cut from another bed already so wont have to buy patch panels. I am looking at different options:
1 Just weld them in with the mig and bed line
2 roll flange and rivet and glue in then bed line
3 add bracing and weld in and then bed line
4 flange and stitch weld in and bed line
I am open to other suggestions as well if any one has got any. Will be adding in a newer style Fifth wheel and goose neck that has the rail system so can still use the bed but can pull both types of trailers.