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Re: 1969 C10 350 engine is bogging at freeway speeds only
just a guess, but you may have something in fuel line or in the fuel tank that is restricting the fuel..if its below a half a tank of fuel, remove the sending unit and see if the tank is clean or has gunk in it. the fuel sock may have came apart also. you can use a flash light and look inside the tank...hope this helps..good luck on your truck....and welcome to the forum from Texas
we also like lots of pic's lets see your truck....
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