I finally figured out my misfire problem it was my Distributor, check yours, you should not be able to move it side to side or up and down, I was able to and when i pulled it the gear was worn about .002 but it was enough to reek all kinds of havoc, I did all the same stuff u guys did o2 sensors, new fuel pump, went from SCPI to MFI, plugs wires every thing, finally i checked that and it solved all my issues.