Hey all, i'm sure this question's been ask and answered a 1000 times here before, but i got a custom built 440 i'm getting ready to change the plugs in for the first time myself. The engines running about 305 HP and 355 FP Torque at the wheel. It's got a CraneCams Fireball Ignition with the Fireball PS91 Performance Coil, and a MSD Pro Billet Distributor (PN 8546) on it. My father-in-law always helped me prior to him passing away here recently. He always used NGK V-Power Plugs (R5670-6 stock no. 2746) in all his mopars, and in mine as well. I got some 8.5 mm MSD wires on there right now too. What i was wondering, for what i got, am i doing right by running the NGK plugs, or is there better ones out there now regardless of price? Also wondering which wires i should be running too? Thanks all!  

MSD & NGK are good products, just make sure you have the proper heat range for the 440. This will depend on the year and compression ratio.
If you want a plug with a longer service life go for a platinum plug.