Relocating the rear differential 1.25” towards the rear of the vehicle on a 72 Dart

I used the US car tool mini tub and inward spring relocation as well. I am running 325/50 R15’s that are 27.8 tall on a set of 15x10 steel wheels.
I am currently using ESPO springs, but looking at CalTracs mono setup pretty seriously.

When we did the spring relocation unfortunately we did not consider that we could have moved the forward mounting location rearward.

I will also see if drilling some new holes 1/2 to 3/4” or so rearward would be possible.

Will the some pics tomorrow.