Correct Disc Brake Caliper for 68’ Dart

I’ll try and attach a photo. I purchased this car where the seller was trying to make a “Mr. Norm” clone 68’ Dart. I’m mostly a c-body guy do am not familiar with this issue. The problem is the caliper is jamming on the lower control arm limiting the turning right or left. It’s jamming6D08D89C-9DF6-4622-81D6-2EA87F3865E2.jpeg on the lower LCA bead. Would this be the correct caliper or is my whole system kind of bastardized?