I'm putting Baer 4-piston calipers on the front and PBR single piston on the rear of my '89. I currently have SSBC rear discs and had to put in an SVO master cylinder to bring the pedal back up. Even with the revalving for the stock master cylinder included with the SSBC rear disc kit, the pedal was going down about half way. I'm thinking I'm going to have the same problem with the Baers since I'm pushing 8 pistons up front now, vs. the stock calipers. The Baers are for all intents and purposes the same as the Brembos on the GT500. Any opinions on the SVO master cylinder with the Baer brakes?