Even without overclocking the Cel will be faster ,
btw I have a Cel 366@550 which completed WU's in about 10.25hrs

,(it's just been swapped out for a PIII 733@800) ,are you sure you're not tempted to stick it in a 100MHz capable board?

.It could actually run at 578MHz but it needed 2.15v & got rather warm!