1961 GMC 4000 Bleeding Brakes After Master Cyl. Replacement

[trav_rich]

I have a 1961 GMC 4000 with power brakes. I had the brake booster and master cylinder rebuilt. Directions and brake shop were adamant that the system could not be bled without a "power brake bleeder". They say it is not possible to bleed system due to this master cylinders complex design. The power brake bleeder was apparently a machine you could hood up to the system and put 50 lb pressure(maybe vacuem) and bleed system. I am told these machines are not around anymore and can not hardly be found or purchased. I was told not to hook vacuem to booster until bled or damage could occur. Any advise?