Spark Plug recommendation; blown 360

I am finally about to get the blower (Vortech blow-thru carb setup) working on my 360 Magnum.

I have read that extended tip plugs are not the way to go with a forced induction engine, and am in need of some advice from anyone who's run a blower on a small block Mopar, Magnum or not.

I wonder if there's any truth to that rumor about the extended tip plugs, and what plugs might run well in a mildly-supercharged 360 Magnum on the street.

It will have 7-9 pounds of boost and a 6-grand redline, and make 420-450 HP, in all likelihood. Compression ratio is a true 9:1.

Any info will be much appreciated.

Bill, in Conway, Arkansas