NGK or Champion plugs and best wires for a mild 318 auto?

I Too am a fan of the NGK V power plugs. Any Quality plug wires will work.

Do not by the Cheap ones! You will be re replacing the wire set one at a time and the wire resistance goes though the roof and wont allow the spark plug to fire. Every time my car would start poping at the top end. I would have go get my volt ohm meter out and find the wire with excessive resistance, and replace it. Bought a set of Taylor wires and never look back.

My favorite is Taylor cables
http://www.taylorvertex.com/spark-plugs/full-metal-jacket-wire-sets/

Been on my Cuda for 20 years and on my power wagon for 15+ years. My next set will be the same.

Sorry can't give advice on heat range. I would go with the stock plug for a 318 in a NGK