I've got a problem with my '69 brakes pulling to the passenger side. I thought it was the left caliper piston sticking but when I pulled the caliper and compressed,the piston then stepped on the brake pedal to push it out. Worked it in and out a few times this way and put back together but the car still pulls to the right when brakes are applied. Rotor rotates easier on left side than on the right after brakes are applied and released. Could left caliper be bad? The car is a trailer queen and gets driven very little. All parts were brand new when restored 10 years ago. Calipers were rebuilt and sleeved with stainless and have always used silicone fluid. Thanks