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Well when I consider how bad the TBI system is, that a TPI stock is rated to give 30% better MPG which if true that works gets me to 18.2…on a bone stock engine, now add in my changes to a new strong 383 tuned for lower RPM Torque, add in the modified PCM with a lean burn cruse, I think I will hit 20+ MPG.
NOW add in the 8 gear auto and the high rear end with a 2.14 to 2.23 I think I will be able to see much more…
Rich
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