SMF - Just Installed!
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Replaced all the bearings, ball honed and reused the 1966 Ford rings, oil modifications and smoothed out the valley. The heads have over a thousand miles on them, if 900 of that was not towing I would have an empty mpg to report. So far it is 6.5 to 9 mpg depending on what's on the trailer. Topped out at 107 mph with the other heads and SP2P. 2nd set of new tires. Does this qualify as grassroots or just back woods? https://youtu.be/6HB7Mz5MVLQ