i need a little help ?

[chevdanbarnett]

hay guys how are you welll i have a 1980 one ton chevy crew cab 454 i am have break prom i cant figer these out at alll but they go to the floor but some days they pump up then 3 weeks later they go to the floor agean and the master runs out of fluid but there is no leaks but there is a little one just be hide the master but i tight it and steal the same thing some times there is breaks and some times there is not kinda lost right now and my momdrives these truck when she moves her trailer little help please trying to figer out what these is