Witch PCM specificly are you talking about? The 7427?
It will do batch fire, but wont do sequencial. It can also do DIS from what I read. Thats my next project after my mpfi.

While on the subject of dual TB's, ever pay attention to the gen 1 vipers V10? They had two TB's, one on each side feeding each cyl bank, and they were tied together with a shaft to make them both...

Heres my findings when I was searching for a TB for my MPI build.

We discussed in this thread several options, and found out a single large blade flows more air than a two smaller ones....