So I went to the parts store to buy plugs for my 440ci edelbrock headed motor in my c-body. Motor is occassionally sprayed 150, and I use an MSD ignition with a blaster 2 coil and good plug wires (ignition system is good).

Plugs on my old NGK split-fires were gapped .50. All they had this time in stock were platinum plugs. I've 'heard' that they should be gapped further out since they require less voltage, and gapping them the same will result in less spark. Any advice/experience?