other than length is there a difference between f350 and f100 . i know the fenders are different .

 

Welcome to FTZ! What is it your actually looking for?? There are variations, the springs on a 250 are heavier than a 100, springs on a 350 are heavier than a 250. Various wheel bases. The floor on a 3 speed on the column, MAY BE flatter then a 4 speed on the floor and so on. Do you have a particular Goal from swapping parts?? What exactly is YOUR truck??
Cap

 

just need a chassis for a truck i have thats sets on a dakoda chassis . not using any of the springs and such.

 

So you have a 1953-56 Ford Cab on a Dakota chassis and want to put it back onto a correct Ford Chassis again??

In a pickup configuration, F-100 had 6.5 and 8 ft beds, F-250, 8 ft bed, factory stake bodies were available. Most common of F-350 would dual rear wheels and factory Stake/Rack body or a bare Chassis to put on maybe a Mason Dump Body, maybe a Box Body, these would not be factory install. There were F-350's with single rear wheels and pickup beds that may have been 9 ft long.
Cap