Best plugs for street 340? Thanks for all the input!

I am curious also. I have run iridium plugs in my Dakota r/t and really enjoy the difference. They smoothed out the idle and start better, not to mention it revs quicker. Are these responses from experience or just assumptions. When I get home, I am planning alittle testing on this and I am also looking at different plugs for my BB Duster. I do know you have to be carefull with plug choice with the higher powered aftermarket ignitions.