I just mounted the box on my 48 3600 and I have an inch+ gap between the front of the rear fenders and the running boards/splash aprons.
I believe the cab and frame are 48 vintage but the box is possibly a few years newer. I got the truck with a home made flatbed mounted. The long running boards were still on it but the splash aprons are a different color from the cab so they and the running boards might be a different year also.
Were there difference between the years that are causing my problem. I can't see any way to get enough movement from anything to get a propper fit.
Any suggestions appreciated.
