A new set would definitely be the best route because even bolts have a life expectancy. If it's just a daily grocery getter I wouldn't worry about spending money on a set of ARP bolts. Probably just go with a used one or set of the lower priced Summit kits. It's your call since you know the intended use.
I have some extra bolts if you decide to go the route of using what you have and need another pm me and we can work out the details of me getting it to you. It'll be free. You just pay the shipping. Tracy