baer brakes on detroit speed subframe

[hulsund]

hello have an problem with brakes on dse subframe on an 1969 camaro
The parts i have is baer eradispeed number 2301011 -13" FRONT
Caliper is baer pbr no 4261444 is from an sport system i think
the problem is the caliper bracket is to small and dont fit to the holes in the spindel. have someone any ideeas about that problem.
is it possible to change the caliper bracket so the caliper i have can fit