On my 94 pickup the brakes suck!bleed them numruous times still suck,no leaks from what i can see.I saw its like 100 bucks to change the master , so i think i will do it . Will this help and how much time does it take to change it out .

 

It does not take long. One piece of advice I have it to buy a factory item. I have had hydraulics from Advance and stores like that crap out after about a year.

 

Make sure you bench bleed the master before installing it, there are usually instructions in the box. If you put it on dry you'll never get all the air out.
And be careful when removing the lines from the old one, especially if they're rusty. It's easy to break them.