i average 55 mph, mostly freeway. 43 was tank average. That was with a small grill block, passenger mirror delete, low tire pressure (30 psi), underdrive pulley, reduced backpressure, removed power steering, and racing transmission (3.94 final drive, .81 5th)
i now have a larger grill block, both mirrors deleted, and soon will have my other tranny installed for 25% lower cruising rpms (3.55 final drive, .72 5th)
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