I know years ago a lot of those QFP '030 accelerators came with overclocked 33MHz chips, but 16MHz? That's definitely stretching it a bit...!
Were the 40MHz PLCC ones ever made?? I recall looking at the freescale site a while back and only finding reference to the 33MHz part... memory could be fuzzy though. At any rate... that amount of overclock is a little ridiculous..