Which 2nd Gens have the 1800 lbs. payload capacity?

I know most 2nd gen Tundra’s have a payload capacity (I'm talking about weight they can carry in the bed, not towing capacity) around 1,200-1,300 lbs., but there are some models where the sticker says 1,800 lbs. I can’t find anything on the internet telling which models have this higher payload capacity. Does anyone know? Is it just the regular cabs? A certain year or trim level?

I am looking to buy a used one specifically for the purpose of carrying a slide in cab-over camper so I need to find one with that higher payload capacity. I have seen them but don't know what to look for.

 

Highest payload will be the regular cab, 2wd long bed with 5.7 SR