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    how can i make power with a 4.2

    I have a 79 cj5 I6 4.2 with 31x10.50 and 3.55 gears not much has been changed on it yet (work in progress ) any way /\I took the old carter 2barrel and replaced it with a weber 32/36 and it took a little tweaking but it is runnking pretty good. The problem I am having it\s with the vacuum at...
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