There were and are still two wheelbases made for one ton chassis.
One has a 60" CA (cab to axle length) for an 8'dump body and the other has an 84" CA for a 10' dump body. If by "dump bed" you only mean it has a hoist the body could be 9-12' long. That would make it unlikely to fit your trailer. My 86' 3500 GMC will go on my 18' trailer w/ 9' body but just barely.

Sorry I do not know the WB or AOL.


1953 Chevy 5-window 3100
In the Stovebolt Gallery
More pix on Picturetrail

Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain