8 3/4 rear axle carrier bolt size

I am getting things together to rebuild an 489 case and have a question about the 4 bolts that hold the bearings onto the case.
What size are these bolts?
Has anyone used the ARP bolts or studs in this application?

I don't know if the bolts in the case are any good after all this time and it is a good opportunity to change them to a better system if possible.