Component sizing help!

Please put up with the newb!

As I am installing a big block in a 69 Dart I thought upgrading the brakes would be a smart move but I am lost for sizing.

Suspension is Alternation front and Street Lynx rear from Reilly Motorsports. There will be disc on all 4 corners. I am not going to use power brakes because I believe that would be overkill and a serious PIA with 440 valve cover fitment from what I understand.I

I have purchased the brake set-up from Speedway and a new aluminum 2 chamber master cylinder from Advance auto. (My brother's a store manager).

Is there a formula used or a chart to help identify required brake line sizes for each location?

The Proportioning Valve is also a puzzle to me. Is an adjustable one required?

Any insight would be appreciated!