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  1. GT40 vs 351 heads

    5.0L Tech
    I was at the junkyard this weekend and found a good gt40 setup off a mountaineer with under 100k on em. i want to use the upper and lower intakes but i was wondering if it would be better performance wise to go with a set of 351w heads off an 89 f250? i know the gt40 heads are pretty good as far...
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