So I work at an ford dealer and I was going through some cross-reference books and came across spark plugs with the part number sp 402. Seeing as these plugs are super cheap (3$) my cost I figure I would try them out and see how they work.

I was wondering if anyone has used or has knowledge about these plugs and how they work. They these plugs can be used in both fb's and fc's and the 1975 pick up as well. So I am optimistic about them and plan to use them after my next fill up and see if the work as well as my current ones which are ngk plugs.

I will post what I find out shortly.

 

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