It all depends on what you have for tools, hoisting equipment, and where you want to draw the line at 'the swap', especially on the cab.

With the front clip off, think about what connects the frame to the cab. Steering linkage, clutch, brakes, throttle, wiring, AC lines, and cab mount bolts. Also anything that may have been added after the fact, such as additional wiring, running boards etc. After that, it depends on what you want to use from the old cab in the new one.

Somewhere on here Star posted some good pics of his method of removing cabs, and IIRC he had a pretty good list of the things that he did in the process.