What a hacked up BlizzardPPC card. :-o
That's a pretty big overclock for the poor 160Mhz 603e. He could have at least kept the original heatsink and placed a better fan on top of it.
Instead, he seems to have used a small-ish heatsink which is holding onto the 603e via adheseve thermal paste(I hope it's not glue). Since the 603e is extra-fragile, this surely means if you ever try to remove the heatsink...bye, bye 603e. :-(