By replacing the stock shackles with sliders, the rear axle is held in place more securely around corners. i.e. less swinging side to side as on the shackles. They will also smooth out the movement of the spring. A good part for any street/strip machine IMHO. Willie
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383 bored .030, Stage IV iron heads ported with MP templates. 11. to 1 comp. MP .528 mech. cam. Holley TBI. TF-727 w/B&M 10" 3000 stall conv. 8. 3/4" w/4.10 suregrip, moser axles.
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