The drum and disk spindles are different for 73-76. They both use the the larger upper ball joints and the lower ball joints. The drum spindles for 73-76 used larger inner wheel bearings then earlier 72 and previous. AR Engineering used to make adapters to utilize viper calipers with the 73-76 drum spindles
[SOLD] - Mopar DRUM Brake Spindles 73-76 A Body Cars Dart Valiant
73-76 disk spindles
1976 MOPAR,DUSTER SPINDLES,DISC BRAKES , CORRECT FOR CONVERSION ,MOPARS 1962 UP | eBay
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