Don,

I'm doing this right now. My rocker and inner rocker were rusted out also. Right or wrong here's what I did in order:

1. Remover rocker.
2. Cut out rusted inner rocker and floorboard section.
3. Cut out front floor support.(Mine was rusted bad)
4. Weld in new inner rocker and floorboard section.
5. Cut out footwell section.
6. Weld in new footwell section.
7. Weld in new front floor support.
6. Weld in new rocker. (not done yet but next)

Like I said, not sure if this is the correct order but worked for me and I'm no expert at this.

Tom

Tom
1965 Chevy C10, 230 straight six, 2WD, 4-speed manual