Best plugs to use???
 

I'm currently have Motorsport spark plugs. I need new plugs , but I'm not sure which to get. I've gotten advice to go w/ NGK platinums. Any recommendations?

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'90 LX 5.0; 12K original miles (no sh*&); 3.55 gears; pulleys;Edelbrock Performer Heads; BBK shorties; MSD 6AL box w/ blaster 2 coil; Motorsport E303 cam; Pro-M 75mm MAF; BBK 70mm TB; Eibach spring kit; Southside sub-connectors; K&N cone filter charger; Hurst shifter; fiberglass cowl hood; A/C-less; rear seat-less; cat-less; Flomasters; Corbeau racing seats (fronts); 30# injectors; 190 lb pump; FPR
12.513 @ 108 mph (pre-inj/fuel pmp/FPR)