Disc Brakes?

Finally did the swap and went with the Wilwood kit for the front. The brakes still feel kind of mushy. Any suggestions on which power brake booster I should get?

I have a 1966 Mustang 289, I installed a front disc kit from CSRP and Mustang Steve supplied the booster, Master cylinder, Proportional valve, and pedal assembly. I also installed larger 11 x 2.25 rear drum kit from Opentracker. I am able to run 14" rims with no problems.
Give Steve a call he will be glad to help. (817) 437-0366