Help with brake lines.

[desert-rat]

For my '69 GMC 3/4 ton.

So my rig no longer has the factory front drums. Got the front end from a '71 3/4 ton Chevy....disk brakes, spindles, control arms, etc. Getting all the pre bent brake lines don't seem to be a problem to get since they seem to fit multiple years. The problem im having it getting the right flex lines (braded please) brake booster, brake reservoir, proportioning valve, etc. that my truck will need for the front disk brakes/rear drum setup. Nothing high end, but not cheap either. Thanks.