Whatever you pick is going to need to be at least 2-3 heat ranges cooler than factory with a gap near .025-.030 to prevent spark blow out. Most run copper core plugs for the cheap cost and the fact that they are great with a boost and the waste spark ignition system. Auto Lite 103's are pretty popular, not sure what number the Iridium NGK's are. Maybe find out what the CTS-V or ZR1 covettes run, as those are a few steps cooler than the NA spark plugs. NGK BR6EF/BR7EF are another choice.
Get a fuel pressure gauge on there, if pressure is dropping you are out of pump. To be on the safe side I think a 255 LHP pump would be a good idea right about now.
