I use NGK plugs, MSD hi vibration coil and Accel 8.5mm wires made from a universal big block kit (get 2 sets that way). I'd check out the site:
http://www.softcom.net/users/magers/html/ngk_lookup.html and look at the plug codes and pick one just on the cold side while breaking in the engine. Pull them frequently to watch the color to make sure they are not too hot. Good luck.