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70000 I've taken quite an interest in the tfi upgrade as it seems the most practical solution over here in the U.K. However on looking on the NAPA website, I found that they list an IC21 coil for the F150, rather than the IC24 coil and so do they over here in the U.K. My supplier told me that...

86000 Hi there, Can anybody tell me the the following: a) After the upgrade, can I use the same type of spark plugs that I normally use with the standard ignition, or do I need a different type of spark plug? b) There is a mention of a resistor that you can buy seperately, suitable for the...