Considering that the 750 was a direct descendant of the 603 line of processors, how backwards compatbile are they? Is it possible to unsolder a 603 chip from a motherboard and solder in its place an early 750, thus turning it into a low clocked G3 without making any other changes or modifications? Could an early 750 processor be a literal "drop-in" replacement on a "non upgradeable" 603 system? And where would I be able to find information about 750 chips with the same exact size and pin count as my 603 chip? From Freescale? IBM? I'm not asking whether or not its worth it, just whether it can be done.