I have a 96 GT with about 150K on the engine. Never been into it. Runs great except right now it needs new plugs and wires and possibly a new pair of coil packs. My goal is to increase the total spark to the plug so it burns cleaner/hotter/more fuel efficient. If I were to install a pair of MSD coil packs and their wires, would I also need a new alternator to make sure the new coil packs were putting out max voltage ? I am running a tired stock 130 amp alternator. Also, what would be the best plugs and what temp ? I am looking at both Denso Iridiums and the NGK's. Finally, what are the best plug wires right now that will give me best performance and still keep the radio noise down ? I realize running everything almost stock right now makes it somewhat superfluous, but I will be upgrading the engine soon enough and want to buy parts now that will support that refresh/upgrade. Any help would be appreciated as always guys. 
