No the cases will not work with a 466 main logic board. The 466mhz has a firewire port that yours does not. Not sure what other little changes they made either outside of more ram (64meg) on the main board, a large hd and a dvd drive.
At the very least you would have to get the bottom case along with the logic board then a complete disassembly..... not for the faint of heart
Larry