If you want a rough idle then all you have to do is look at the lobe seperation on the cam specs. The lower the # the rougher the idle will be. Be careful....bigger cam does not always mean more performance.
If your engine is stock then I wouldn't go too much bigger on the cam.
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'82 GT 351W,BBK shorties,
Comp Cam,edelbrock intake
625 cfm carter carb. c-4 tranny w/ pro stick shifter. 4 core radiator
Mallory distributor. 3:27
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