Stepside bed?

[Dusti]

I know chevy used the same tailgates for earlier and later trucks and the stepside fenders are different on older and newer but i was wondering if the bed is the same?
I seen a older stepside bed that somebody had made into a trailer that they were selling , I was thinking about stopping and getting a closer look,would look good pulling a stepside trailer behind the stepside when I have to haul any junk
I was just wondering if the bedsides and the front of the bed are different.
Thanks