I think overkill needs more real world testing on platinum plugs, then he would know how much platinum plugs suck ass. Can't tell you how many times I've read threads with people installing platinum plugs only to have issues down the road or even at my last job, someone installs the incorrect plugs and thus they have issues with it running.
Over gapping the plugs seems completely wrong too. It doesn't matter that the plugs is hotter, you are just making it easier to blow out the spark with a larger gap. That is the opposite of what you'd really want.
I'd never ever run a platinum plug on these waste spark ignition systems, there was a reason they came with iridium plugs from the factory. They are a better plugs and can handle the waste spark system way better.
Last time I checked GM still used Iridium plugs in all there factory supercharged cars like the CTS-V and Corvette's but with a lower standard gap of .030ish. They still wanted them to be a 100k mile plug.
