Question for the disc brake Gurus

[AJohn6]

I am getting ready to start round 2 on my '71. I just ordered a ton of parts and am now trying to make a game plan on what needs to be accomplished.

I ordered the Wilwood 13" front/rear disc brakes, Scotts Hotrods under the dash pedal assembly, remote dual reservoir and 7" booster w/ corvette style master cylinder.

My question is as follows.

What is the purpose of the coiled brake line just after the proportion block and are they needed? With an under dash assembly, as long as the master cylinder and reservoir are the highest points of the system do I need a check valve?

Thanks in advance,
Adam