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Old 02/12/07, 07:58 AM   #2
Bronco Guru
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Cuz that's how I roll.

Tangent, OR
Joined: Nov 05
Posts: 4,983
Buy a manifold vacuum gauge and install it in or under your dash. Take your EB to a shop with an exhaust gas analyzer and tune the carb for maximum economy, not performance. You may have a vacuum leak or things other than just the configuration of your engine contributing to the not so impressive gas mileage. How aggressively do you drive?

I have a 429 in my F150 PU that gets better mileage than your 351...pretty much always and it has a 750 cfm Edelbrock, cam on the lumpy side, dual 2.5" exhaust, NV4500, 35" tires, etc...not to mention weighs in several hundred pounds heavier.

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