Re: Manual to Disc Brakes
Al's pics and advice are true for a 69 model car; however, for 67 and 68 models, the front brake hardlines and flex hoses meet/connect at a bracket on the side of the frame rail, like a 69 drum car.
The AIMs do show different part numbers for the front hardlines for the standard brakes (manual drums) vs. power (both power drum and power front disc use the same hardline part numbers), but they connect at the same place on the frame rail side.
Looking at the drawings, it appears the manual drum lines are bent a little differently, because they fit into the splitter block/warning switch with the master cylinder mounted directly on the firewall (vs. mounted on the power booster).
Now, the question is, which flex lines do you have? Are you using 69 style, single piston calipers, or the original 67-68 style four piston units? Flex lines for original 67-68 style calipers run from the frame rail to a bracket on the caliper back, and then there is another, short hardline into the caliper itself. Flex lines for the 69-up single piston calipers have a banjo fitting on the end, and connect directly to the caliper. If your flex lines are the 69 style, and they are made for converting a 67-68 car to 69 style brakes, then they should be long enough to connect to the hardline on the frame rail side. If you got actual 69 style and length disc brake hoses, they were meant to be connected as Al has shown above.
Two bottom line issues here: If the flex hoses are long enough to connect to the 67-68 hardlines without getting pulled, they should work. However, if the original hardlines are OE to the car, and therefore 40 plus years old, it is cheap insurance to buy new ones...
69 'vert project big block/TKO 600 RR
68 'vert driver RS clone -- gone!