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11-29-2018, 08:38 PM
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Registered User
Join Date: Jul 2012
Location: Space Coast, Florida
Posts: 408
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Gas mileage increase- six to BB OD
Just wanted to post this for who ever is interested, but I replaced my 250 six Powerglide trans with a .030" over 454 and a overdrive automatic and got over two miles per gallon better mileage. Always got around 9.8 to 10 with the old power train. Just got 12.3 mpg the last tank with the big block overdrive.
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1968 SWB Step Side, Big Block, 4L80E , Running! |
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