Hello! I’ve been lurking for a while and had a question about brakes. When I got my 1981 celica Supra around a month ago it had a super soft and irregular breaking, and I noticed the brake reservoir was empty. I assumed there was a leak and planned to top off the reservoir and pump the brakes with the car over a drop cloth to find my leak. When I added more fluid, and went to pump my brakes they went rock hard and barely move. There is no visible leak on the vacuum lines to the booster, and the pedal returns slightly when turning the engine off. Should I bite the bullet and install a new booster? Just bleed the brakes or try a electric vacuum pump for the booster and cap off the lines from the intake? Any advice is appreciated I’m really excited to be a part of this community.