Re: Final Questions before I start....
"as for the master cylinder there is a valve inside you yoink out and it will work on discs too,"
I'm sorry, not really accurate.
With regard to the brakes .......
The 1st valve "thingy" is called a residual valve. It is fitted to the drum brake circuit of the master cylinder. It's purpose is to mantain about 10psi fluid pressure in the rear slave cylinders to prevent air drawing back past the cups. If disc calipers are connected to a drum master cylinder, this residual pressure will cause the pad to drag on the disc. Yes, it is possible but not feasable to remove the residual valve.
The second difference with disc master cylinders is the fluid volume. If you look at the two, the disc/disc master is much taller than the disc/drum one. This extra fluid volume allows for the greater displacement of fluid in the rear calipers as the pads wear. If you use the disc/drum master (with residual valve removed) you pose the risk of running out of fluid when the pads wear down.
The 2nd valve thingy is the proportioning valve, fitted below the master cylinder which the brake lines run through. The proportioning valve controls front/rear brake balance. You must use it with the discs.
Fuel line: try and keep the system as suited the motor. If you must cut and join, do it between secure, clamped lengths of the line, like where it is clamped to the rail. If necessary, add a few line-to-chassis clamps. You SHOULD be putting a ball flare onto each cut end. The stops the rubber "joiner" being able to slide off. You can do this later or take it to you local brake shop and ask them to do it. Or hire a flare tool.
Think about this; what are two things that can kill you in a car?