Pete:
You're running MegaSquirt, right?
If so, think about distributorless....I am thinking EDIS (heaven forbid using a Ford product on a GM Engine, but it IS proven and supported by MSnS_EDIS, and you already have a hybrid - right?).
Seems like a good way to avoid all problems associated with distributors and high energy ignitions.
I will second Mike C's comments about Accel caps, rotors, and even condensers (once had one of their brand new ones go out on me, stranding me for a while).