The std ford bolts are stretch blots, and do indeed need changing every time, although some don't!!
The std ford bolts for the mains are ok, and don't generally give trouble, but replacing the rod bolts for ARP is good practice.
Personally I like and use ARP stud and nut kit, but plenty don't, plenty also blame the arp's for cracking blocks, which is when they are not fitted properly.
tabetha