I finally got my eldorado calipers for my 14bff swap today. I am planning on installing them tomorrow and have a few last questions. From what I understand there is some sort of a check valve that maintains a few pounds of pressure in the lines for the factory rear drums. This is located in the master cylinder right? I would imagine this should be removed, can anyone tell me where to find it, and how to get to it and remove it? Oh, and the truck is an '89 Jimmy. I was also wondering if I am going to need an adjustable proportioning valve, or am I ok without one? And the last question I have is about the e-brake. Do you guys just use the stock e-brake cables to run the ones on the caddy callipers? Anyone got pics of their setups? Thanks in advance for any help!