Front End Problems

In order to get the floating caliper disk brake on the 67, the upper control arm had to be swapped out for one that would accomodate the larger ball joint required by the spindle. Once this swap is done, either a 73 & > disk brake spindle or a 68-70 B-body disk brake spindle can be used. The problem with the B-body spindle is that it is taller than the A-body one. This throws off the suspension geometry for street use but might be ok on a car that puts on mileage a ¼ mile at a time.

The spindles can be reversed with no real problem. Reversing the spindle makes sense when a floating caliper disk brake is being installed on a pre-73 K-frame and equipped with an anti-sway bar. The caliper hits the sway bar when mounted in the forward position. The newer K-frame uses a different sway bar design that avoids this problem.

When I converted the Demon to BBP disk brakes, I changed the K-frame, suspension and brake components in one shot froom a 75 model. The 74 you mention would be a good donor. (I also installed a cop car steering box and the engine on the K-frame. Installed everything from the bottom.) Good luck.