A Body Disc Brake Swap 101

Hi I have a V8 1970 dodge dart swinger that I recently put all new bushings in and and all new ball joints in. I converted it over to 1973 dodge dart front disc brakes and upper control arms. I had everything torn apart at the time. Now that I have it together, but not driven yet, both calipers are behind the spindles rather than being in front of the spindles like I have seen it in a few pictures now...are the spindles directional, and I NEED TO KNOW: will this throw the castor angle off?? I tried adjusting the upper control arm adjustments and it still looks like the angle of the spindles are still leaning foreward and I'm thinking it might steer like a shopping cart...and if I am wrong, and have to switch them around, what soft brake lines should I use?? and do I have to change the hard line spot where it would screw into the soft line?? Please advise!!
Thank you,
-ANTHONY