Wilwood 151-15196 is the part number. You don’t have to change your booster. I did. I went with a dual diaphragm booster and bigger master chrome plated from leed brakes. They did have to custom make my booster though. There c body one for my car did not fit right it was way to long. So I had to modify my fire wall and have them make me a booster. And I used a wilwood proportion valve as well. It’s not a cheap thing all said and done I’m over 3500-4500 just in parts. I do all my own work so lucky I don’t have to pay to get it done.