So I don’t have my truck anymore but here is what I think your looking for.
Top of bed to bottom of over hang is 25.25", I have some CAD that has the bed to roof at 21.17" and shark fin at 23.29"
Width from out side of seal to out side of seal is 67"
Length from end plate to end plate 68"
The mounts go to the OE bed rails, so as long as those are still in place you good.
