Larry, the plug ratings are more a function of their heat dissipation characteristics then what type of ignition you have, so the heat range of the plug is what you need to be concerned with and what to run may not be all that different then the stock plug.
Nowwwwwwwww as compression increases, it takes more voltage to arc current across the plugs gap, so a high energy ignition with a high voltage rated coil may well be in order. Then once you have BOTH an elec switch to handle the higher energy coils current,,,,,,,and a coil that can achieve the higher necessary firing voltages,,,,,,,,,its typical to also use a wider then stock plug gap for a WIDE FAT HIGH ENERGY SPARK woooooooooo hoooooooo.
Still the heat range of the plug can be the same as a stock plug, its just that you can get by with running a wider gap if you have an elec switch and higher voltage rated coil.
NEXT if you dramatically increase the firing voltage (due to more compression and a wider plug gap) you need good quality higher voltage withstand rating plug wires and a good quality distributor cap etc. Still a good quality set of stock plug wires can likely withstand the higher operating voltages buttttttttt when you drastically increase compression and run a wider plug gap and higher voltage coil, its good to use the quality higher voltage rated plug wires.
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