Hello all!!!! I've found a wheel conversion kit that will take me from my 5 lug manual drums to 5 lug manual disk brakes. It's pretty cheap and i'm really excited. But i have a question.....the master cylinder. The one in my car has been upgraded to a duel well already and i don't want to replace it if i don't have too. I called a guy that sells the kit and he said i better just get a new one because i'll need a new proportioning valve. I already have a line lock (turn valve setup) so can i just use that to adjust the brakes? If not how about just getting a new proportioning valve on the master cylinder i already have??? What are my options?