Recommendations for best spark plug spec for a 302 needed. I bought the engine as a 'short' engine, with nothing on it, Inc plugs. I think it is originally from a 1980s truck, but it's now been completely rebuilt, and running a stage 2 cam (or was it stage 1?) along with a FiTech fuel injection system. I'm in the UK, so big, widely available brands would be best please.