1970 DUSTER 440 4spd 8 3/4 posi

I did the leaf spring relocating kit on my 65 barracuda and where you have to cut out the rear frame rail is where the rear e-brake cable guides are spot welded to. I used a spot weld cutter and removed the e-brake guides before I cut the frame rails. Sounds like to me that whoever did the spring relocation on your car wasn't too concerned with e-brakes on the car and they didn't bother to re install the cable guides. I would find a parts car and go with a spot weld cutter and a drill and remove the guides you need if you want the factory look. Otherwise you can just make some yourself and find where to locate them on the spring relocation box by installing your rear e-brake cables first.