Re: 4 wheel disc brake conversion gone bad
it'll end up being the park brake adjustment. take cable and the return spring off. use channelocks to actuate the lever as far as it will go. make sure it will stay there or hold it there. loosen the nut that holds the lever on but be careful, it's possible to push the stud into the caliper. PITA then. any way, take the lever off and rotate it back one notch and put it back on. This will be 1/6 turn since it's hex head. Let it push it back to the stop like the spring does. Again use channellocks to actuate the lever, see if you can do it again. do it as many times as you can to tighten up the e-brake adjustment. Do the other side too.
While you're under there look carefully at the mounting position of the caliper. Many of the aftermarket brackets don't mount the caliper with bleeder at the highest point. You'll never get the brakes bled if it's like this. Mine was a PITA because the brake line and the cable kept it from rotating back far enough to get the bleeder straight straight up. Some guys pulled the caliper and put a block of wood between the pads or used a c-clamp to hold the piston from coming out while bleeding. On this part do the passenger side first. In fact, I would do the bleeding first, then jack around with the e-brake adjustment.
Clear as mud? good.
Plan on getting a park brake cable on it. Soon.