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  1. Chevy C/K Truck Forum
    How is everyone? Here's a question. How should I get 3000 RPMs and to get 70MPH in on the Louisiana Interstate, which the Speed Limit is from 60MPH to 70MPH? Vehicle is a 1983 C20 Dually with installed TBi 454 of 1995, with Longtube Headers and Dual Exhaust. 3 Speed Automatic TH400. Tires are...