I am looking for a modern rear axel for my 1954 F350. My truck has a custom steel flatbed with dually wheels. I want to keep it dually. I found a nice Dana 70 rear axel out of a 1985 F350 cab & chassis, but the overall width is 4" more than the stock axel. This is the narrowest axel I could find at the wrecking yard, and it will bolt in with no modifications. Is a pre-1979 F350 axel narrower?

 

i just picked up a 9 in from a 79 for my 50 merc m-68 yesterdayand after ready all these forums ,when i got there it still didnt click in my head that the 79 is 4 ins to wide for my truck untill i got home and just unloaded it,how i dont know what to do with this one ,all the forums say 60-72 almost bolt right in(not sure what the almost is)so i will have to find another one.i hope you have better luck.