Do you have JB5 brakes (common on 1500s) or JB6 brakes (rare on 1500s)? If so, you have low-drag front calipers. Those are not compatible with the so-called "NBS" master cylinder.
Low-drag calipers require a three-chamber master cylinder, with a huge bore at the back end. The third chamber provides a huge volume of fluid at low pressure, to push the caliper pistons up to the rotor face. Then the high-pressure part of the master cylinder actually applies the brakes to stop/slow the vehicle.
Three-chamber master cylinders have a step in the casting like the one below. Note the large-diameter piston and seal at the rear of the primary piston:
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If the original master cylinder you removed from the vehicle had a step in the casting, you bought the WRONG master cylinder. The "NBS" master has a large bore all the way through, which throws away hydraulic advantage--if the booster fails you'll need both feet on the brake pedal. If your wife is driving, I hope you have good insurance.
Stop trying to re-engineer the brake system, and fix what's wrong--as I said in your other thread, you've got failed brake parts, you've got air in the system, or you've got brakes that are way out of adjustment. Maybe a combination of problems.
Have you ever bled the ABS using a scan tool?
Have you ever popped the drums off and adjusted the horrible leading-trailing shoe rear brakes? If you have JB5/ leading-trailing rear drum brakes, and you don't use the park brake frequently, the brakes aren't going to self-adjust.