No. First of all, XEON CPU's use Slot 2. While there once was a Slot2 to Slot1 adapter on the market, I don't think you'd be able to find one for sale. Also, you bus speed will most likely be limited to 100MHz, which would make a PIII 1.4 run at 1050MHz.
<font color=blue>You're posting in a forum with class. It may be third class, but it's still class!</font color=blue>