Eaton does not supply ring gear bolts with their positraction units, if you need ring gear bolts, DO NOT buy bolts with the SMALL 5/8" head! GM uses a special 3/4" large head bolt with tiny "stair steps" in the underhead seat, this keeps them tight and supports the bolt. The 5/8" headed bolts only have .062" flange under the head and it will sink into the carrier after a while and come loose. Use GM # 1241564, or Mr Gasket bolts. I haven't been able to find ARP bolts for this axle. Bolts are 7/16" 20 X .850" LH thread.
Here is a Ratech bolt from Summit with the "small" 5/8" head.