looking for hardbody 1 ton. help!

[NismoHead]

Im looking for an early to mid 90's hardbody 1 ton. i have had no luck getting any info on these but i know they are out there. so i need to know what in the VIN number makes them a 1 ton. they are supposed to have a dually rear end and beefier leaf springs but thats all i know. one other question i have is do the long bed pickups also have longer fram rails as well or are they the same.

[NISTECH]

The 7th and 8th digits of the vin should be 5H I believe

[NISTECH]

Furthermore we had one when I worked for a nissan dealer in stockton as our parts truck. The dually nissan trucks never came with a bed from the factory. It was just a cab and chassis, the truck was only sold as a fleet vehcile so the companies that bought them sent them out to have whatever bed they wanted on it.

Here's a 90 claiming to be 1 ton but is not a duallyhttp://sfbay.craigslist.org/nby/car/556999269.html