117.5 longbed is 131.5
111"
YES it will.
Yes it will.
Yes, There the same.
Yes, It will bolt right up.
No it will not it is all different, It won't even match up with the cab.
Long bed - 168.4" short bed - 150.3"
Unbolt it from the floor.
it is made of aluminum alloy
No they are not, The 78 does not have a computor. But the 88 does have and that means more wires and different wires.
NO it will not work. Everything is different. Cab mounts, body weith, ECt.
High-powered explosives.