Stock Chev springs will usually go to around .500" valve lift before they go into coil bind. More important tho is to have someone check your springs with a spring checker to verify pressures at installed height and at full lift. You will find that the stock springs start going away at full lift, even with a stock cam. If you are changing cams, I would highly recommend that you install new springs, sourced from the same manufacturer as the cam and go with their recommendations. This is good insurance.
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