I have a 65 Riviera that I'm trying to remove the brake booster from. But, I can't get the push rod off the brake pedal inside the car. Also, will I have to remove the rubber seal around the rod that appears to go through the firewall. If so, how? Any step be step advice will be greatly appreciated. Last question: my booster is painted black. Is that the correct original finish or were these anodized gold as I see sometimes?