chaffe for the cost of bolts mate why put the old in and as for time if you are doing anything to an engine you are going to need parts ie shells or HG unless you have a stock of them so when you are there why not pay the little bit more and do the job right.
the OP is rebuilding his car and sound like he wants a good job doing so for the cost of some bolts i would just put them in.
i put arp stud and nut kit on mine and had a HG fail running about 30psi so put ford bolts back in and never had a problem
so imo ford head bolts and i would put arp rod bolts in mate