This is what I'm doing at the moent, but to be hoest your better off buying a Calibra Trubo due to the cost, ie you can pick up a the whole car cheaper than the parts!
But otherwsie yes it will bolt stright in.
1) fit C20LET and F28 in (or keep F20 box)
2) keep the F20 driveshafts
3) if using F28 box, need to convert it to 2wd
4) need to have the C20LET rad and intercooler becasue they are different (plus all the pipes)
5) need a c20LET speedo/dash for correct readings
...thats ths basics
But you may want to upgrade the brakes and your shocks/springs (as its a heaver lump)