DOT-5 fluid anyone?

In order to be sure all the old fluid is out you will need to replace or rebuild your wheel cylinders/calipers.I have noticed the most advantage on my cars in very long storage( 2/3 yrs plus)in almost any car that sets that long the wheel cylinders will leak(the residual pressur valve can only hold pressure so long)when the dot 5 leaks out it seems to evaporate.no corroded cyl.no fluid soaked shoes etc.the master will be very low but if topped off the brakes work exactly the same as when last driven.I just recently converted my '66 cuda to late model disks and the last time I was in those brakes was 1986!!!