I'm looking for some help on this one fellows. My 49 is pretty much restored to original. When I spend a few miles on the freeway I have to pump my brakes a couple of times for them to come up. This doesn't happen when driving around town, or even if it's been sitting for a while. This only happens after high speed (55-60 mph) for 5-10 miles. The first time it happened I got the pucker factor when I was coming to my exit, but I just pump it a couple of times and it firms up. There is no leaks I can find anywhere and the master cylinder stays full. Any thoughts?
