i had pelican cases, they didnt hold up so well in baja. ( I tried OG pelican 1500 and 1600 series, air series, and the vault series). All but the OG 1600 cases had the tops deform enough so that the seal leaked when strapped down in the bed of my raptor.
I'm not sure how the storage boxes will stack up in the durability dept.
Then I went to Yeti go boxes. They are seriously tough. They held up perfectly to Baja. They're just a little small and once I finally ditched the bed, they really didn't fit that great in the back of the truck.
I just got a Roam Adventure company 160L case that fits my storage area platform perfectly. I'll be on its maiden Baja voyage in march and will report back with how it weathered.
If you're willing to drill a couple of holes in the bed,
removable tie-down cleats are $45 on amazon.
if you get those, the boxlink brackets really aren't that important. I'd also be worried about potentially deforming the bed if you put really heavy stuff in the box. ( I carry all of my tools and spares in mine and it weighs about 500lbs ( give or take) when loaded up.