disc brake conversion

[pocketpool]

I have a 68 shortbed that I am doing a complete frame off resto on I am to the point of buying new brake lines and was wondering if I would need 72 brake lines since I converted to disc up front. Also I noticed that the 68 and 72 front lines are ran differently. I have already blasted and powder coated the front cross member and dont want to have to mess that up by moving any mounting locations for the lines. Is there any way I can use the 68 lines routed in there original location and make my disc brakes work correctly? HELP PLEASE