58 fleet: long vs. short bed?

[Tod59]

Hey Guys,

I have a 59 short box fleet. The passenger side bed "spear" was damaged at one time and previous owner didn't fix it very good. Also, I found some repair and bondo around the passenger side rear wheel well.

Question: If I found a fleet long bed box, is the wheel well area the same as a short bed the same dimensions wise? Could I cut portions of the long spear out and graft it into my short spear?
Thanks.