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The main idea is to get rid of that ridge to smooth out the air. Going too much beyond that isn't really necessary unless you have some other mods to take advantage of it. And at that point you'd be better off with a bigger TB anyway. Yours looks about the same as mine. Is the throttle blade knife edged? That would be the only other thing worth doing.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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