brake issues, help me get my car driving
1. Does the stock brass junction block that all the brake lines connect too, differ from a drum car to a disk car ??.
Yes. The all drum block has a piston operated switch inside that activates the warning switch. In effect, "one end" is a junction point for the front end lines, the other end of the device is a junction point for the rear lines of the car. The factory front disc is a prop valve as well as a warning switch. Here:
http://www.forabodiesonly.com/mopar/showthread.php?t=189489
The top photo in this thread is an all drum warning switch / junction block
http://www.forabodiesonly.com/mopar/showthread.php?t=134889
2.is the 1 1/16 bore master cylinder good enough for disks all around ?r.
Not sure of the bore. I'm using the original unboosted factory all drum master on my 67 for front 73 / 74 Duster disks, and rear Versailles disks. All I did was to rupture the residual valves in the master. Mine worked out well. Make sure if yours was originally a drum master, that you remove or rupture the residual valves. I would simply try it in regards to pedal stroke and pressure. I'd estimate I get about 1/3 of a pedal stroke, no more, and a "rock solid" pedal. Not long after I got the conversion done, I "got a chance" to try them out when someone ran a stop sign. I'm 65 with arthritis problems. Man I tromped that pedal, and slid that thing to a stop from about 32 MPH like you can't believe!!!
3. Is there a way I could have routed the lines from the master to the junction and then from the junction to all the calipers wrong?.
Not sure, but I'd say yes. Who knows, you might have crossed up a front with a rear, or some dammed thing.
4. How do you know if your brake pedal/ mc pushrod is property adjusted ?
This "should" be easy. You need to be able to establish mechanical play between the rod / pedal linkage and the master piston. If the piston does not fully return all the way to the rear, it will not expose the transfer ports between the cylinder bore and the reservoir(s) and will either lose prime, or will lock up and heat up the brakes.
