PO _ cluster Question

[63lemon]

1.so the previous owner destroyed my 63's instrument cluster, and i want to get this straight, so any 60-66 instrument cluster will work in my truck,

2.when replacing rockers and floor pans, do you do the floor pans first, or rockers first. And does the cab need braced, when cutting floors and rockers

3. What the best stuff to use to paint the frame and other equipment in the undercarriage.
thanks for the help guys, this site and information is great