Classic/Antique Car Repair: 1948 Packard brake system, airplane type, bleeder screw

Question
I have a 1948 Packard 2292. some years ago I put in some incorrect brake fluid (airplane type) and destroyed all of the brake rubber pieces. I had it repaired and drove it for a couple of years then put it in storage for appox. 15 years. I am now starting to put it back on the road and the brakes need fluid. I have been told to use DOT4, DOT3,or Silicon type only, and any type now adays is O.K.,By part houses. The original shop who repaired it back then is gone. As maybe you can see why, I am paranoid about using the right type this time. Could you give me any advice, so that I do not have to go through the experience I did the last time I added brake fluid. Thank you.

Answer
If the car has been stored for 15 years there is a good chance that there has been some condensation and that there is some moisture contamination. Also most of the fluids used 20 or so years ago were more comparable to today's Dot 3 fluids.
So, I would flush the system by adding DOT 3 fluid and bleeding the system until clean fluid comes out of all 4 wheels. Follow the recommended bleed procedure using a small piece of rubber hose over the end of the bleeder with the other end in a jar with some brake fluid in the bottom. Then pump the pedal, oh I forgot to mention that this is a two man job, until the pedal comes up. The person in the car holds pressure on the pedal. Then open the bleeder screw and watch the fluid enter the jar. Close the bleeder screw when the person in the car has pushed the pedal to the floor. Repeat until that wheel run clear and shows no air bubble. Top off the cylinder and continue to another wheel. Start with the wheel furthest from the master cylinder, which is the right rear, then the left rear, right front and finish with the left front.