I've had some good experience with Hydroboost brakes. Many years ago I had a 1986 5.0 Mustang. If you are familiar with Mustangs of that time, you know they didn't stop very well from the factory. To improve braking, I purchased a rear disc brake kit eliminating the drum brakes. The brake kit adapted rear disc brakes from the Thunderbird. I was very disappointed that there was no improvement in the brakes at all. So, I continued using the vehicle with unimpressive brakes.

Several years later, I read an article about adapting Hydroboost braking components from a non-ABS Lincoln LSC onto the Mustang. I got the components from a junkyard and had my mechanic install them on my Mustang. And, I couldn't have been happier with the results. There was a huge noticeable difference in braking. The brake pedal felt better and more consistent than with the vacuum brake booster. And, stopping power was noticeably improved. In fact, I would say the stopping power dramatically improved. Although the brake pads, calibers and all other braking components were the same, the Hydroboost set up increased line pressure which increased the amount of force squeezing the calipers together.

I have no experience with hydroboost brakes on a Mopar, but I plan on switching from a vacuum brake booster to hydroboost set up as soon as my budget allows. In my opinion, the feel of a brake pedal on a hydroboost set up is more consistent and predictable than the pedal feel of a vacuum brakes booster. Vacuum booster brakes can feel spongy sometimes and this is never the case with a hydroboost set up. If I remember correctly, a vacuum brake booster operates anywhere between 800 psi and 1100 psi and a hydroboost brake set up is between 1200 psi and 1500 psi. On the road, this means that you use less brake pedal effort to increase braking force to your calipers.