[Southpa]

Does it matter in which order the floor, rockers and cab corners etc are replaced?

Yes, but its pretty much common sense and also depends on where your cab is, ie. on or off the frame. I did mine while it was still on the frame. CORNERS LAST, or you will have a real job trying to get those rear supports fastened in properly. In fact its way easier to take your old corners out first, then get your rear supports in and finish with the new corners. Lots of room and you can see what you are doing.

In my case the areas on the inner rockers where the supports are supposed to bolt onto were gone, totally rotted out. So I welded some nuts onto strips of 12 ga. and welded those over top of the existing inner rocker. It worked well because my strips were slightly narrower and I could wrap the edges of the inner rockers around my 12 ga. and weld those seams up as well as the ends. Then inserted the supports and bolted them into my fabbed 12 ga. strips. Everything was coated with rust inhibitor and then primed followed by rattlecan rubberized coating.