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Message: <blockquote data-quote="cantbuytime" data-source="post: 773533" data-attributes="member: 12590">1st,: those 30lb injectors are overkill and you probably dont even need 24lb injectors. You are going to have issues, even with a tune.2nd: dent in the header is fine and buy shorty spark plugs from Jegs.. or find FRPP M-9430-P51* headers. Thats what I had bought to use with my P heads after the first set of FRPP headers had to dent and use shorty plugs..3rd: F-cam + factory computer = trouble without a Tune.. U need to invest in a QH or PMS. You can get both for less then $300.. A chip is a waste unless you can tune it yourself or it can be easily tuned by a shop. The over the counter pretuned chips usually are for bone stock cars and once u start modding the car it wont run right..THIS IS FROM MY OWN EXPERIENCE, NOT SOMETHING i READ OVER THE INTERNET.. Check my build thread., LOL.. I did this same setup and used a PMS tuner . Yet the 24# injectors were still a tad much..As far as timing goes, just do it as u should. Advancing the timing 8 to 12 degrees till it can be dyno tuned. Thats the only way you are going to find out what timing advancement your setup likes, short of going to the track to test & tune...</blockquote>