The replacemant bolts from the auto parts store should work fine with the aftermarket headers. I bought a set of MAC equal length headers used from a local speed shop, and I used all 16 of the stock bolts, and they worked fine.
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'90 GT Under construction
Best E.T. = Fast @ High Speeds - OK So I Lie. So What!!!  
04 F-150 STX 4.2L 5 spd
Rice Haters Club Member #128
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