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Re: Not sure what to do
On my 408 (396+.060) I ran both a 750 Edelbrock and then tried a 600 Edelbrock.
The 600 worked well in a 1980 K-20 4x4 (465,3.73,33inche tires) The low end torque was stout! The truck would avg. 13.5 MPG in the mountains. My commute was 16 miles with a 3100 ft elevation change. (6000 to 9100). Give the 600 a try. What is your idle vacuum like with your present cam?
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