Rear disk conversion issue

Update. I checked clearance of the pads tonight and nothing seems to be dragging. The spacers are on per instructions. I checked the parking brake again and it is adjusted correctly. I talked with a older retired mechanic and his first suggestion like @Garrett Ellison , the hose on the diff. I now have a new issue with low pedal. I had the rear tires spinning in gear and the brakes would barely stop the freewheeling. Now it seems I have poor rear brakes. I have ordered a new master and rear hose. Besides, I never liked the bulky corvette master. I'll get my power bleeder out next and check fluid flow. I've been avoiding clamps and pressure gages but, it looks like I have to go down that path. I will report back. Craig