Couple questions before I do my brakes

I started a thread in "General"....but that was the wrong place and plus I have a few last questions

http://www.forabodiesonly.com/mopar/showthread.php?t=316140

So the P.O. converted my 68 Notch Back to disks from a 73 - 76 Duster - but never changed the master cylinder and never added an adjustable proportioning valve.....

Disk in front, drum in back and NON-power brakes.

So I got the recommended master cylinder (Raybestos Part # MC36412), new calipers and pads, new rotors and wheel bearings (already installed them last weekend), and an adjustable proportioning valve.

So, my questions are:

1) The proportioning valve goes to the REAR brakes - yes ?
2) Is the brake line closest to the firewall the rear line?
3) The metal lines off the M.C. have loops bent in them - is it ok to cut out the loops and insert the P.V. there? (see pics)
4) Any tips you can offer, things to watch out for ?

Thanks!

:burnout: