Blue Crown Spark Plugs and general spark plug discussion for step-downs

Hi everyone my car arrival has been delayed till next week. So I have been doing some research on plugs for step-downs to pass the time by. I know original equipment for Hudson is a Chamion H-8. I have also dug up info on new plugs, a 7915 Bosch, 216 Autolight, and a B6L NGK are sopposed to have the right heat range. In addition I believe an E3 E3.52 might also work, though I have not confermed this yet. Also I know that Blue Crown was a major supporter of Hudson and sponsered Frank Mundy. Does anyone know what Blue Crown numbers work for Hudsons. This is more of a curiosity since I can't find any info on BLue Crown's cross over numbers. Also please let me know if you have found any exeptional plugs that work well with todays gas for the 232.
Thanks everyone
Brandon