Just fixed that issue the new calipers were NAPA and would barely spin. Took them off went and bought Advance Fixed do they drag yes, but not too bad Be careful that your master cylinder is not the source of your issue Many drum brake master cylinders passed off as disc in the reman world.

If you want drag free brakes use four piston disk brakes They are like unadjusted drum brakes and stop fine I rebuild my own