I need to install some "hardened wheel studs and there are 2 offered......Which will fit my 70?

.486'' Knurl; 7/16''-20 press-in stud features a .486'' knurl, will fit most late GM drum brake applications.

.580'' Knurl; 7/16''-20 press-in stud features a .580'' knurl, will fit most late GM disc brake and early drum brake applications.

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"Laissez Le Bon Temp Rouler' Cha!"
1.78 60ft. 12.23 @ 110 (so far)
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70SS396 & 70 Malibu
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