PowerFC will not necessarily solve the misfire issue.
Yes, it will get aroung the R&R issues, but I have just installed a PowerFC and am still missing at ~5000rpm with anything over 14psi.
My coils aren't the issue either because I have done a Bosch coil pack convesion and even then I had to gap my plugs to .6
I am beginning to suspect there is a voltage drop to the coils at full load because the miss only happens at WOT. If I give it half throttle it will rev cleanly all the way to redline, but give it full throttle and it shits itself.
In summary, try gapping your plugs to .6