Brake Upgrade Quetion

[69gmcc10]

I am in the parts gathering and budget making part of my front disc conversion on my 69 GMC and had a few quick question about boosters and master cylinders. I did some searching and could not find a solid yes or no answer, just an ocean of grey, so thanks in advanced for any help.

I currently have a 69 GMC I am upgrading to discs and I have a 72 parts truck I can take from. The GMC already has a booster and it works awesome, so can I just take the 69 master and distribution block off the booster and bolt up the 72 master and prop valve to the 69 booster? If so, are there any adjustments I would need to make for it work? Do I need to or should I swap out brake lines; fronts, rear or both?