If you're considering reusing your ARP wheel studs, there are a few things to keep in mind. Firstly, depending on the condition of the studs, they may not be up to the task of holding your wheels securely in place after being removed and reinstalled. Secondly, even if the studs are in good condition, it's important to make sure that they're properly torqued to specifications when reinstalling them. If not, they could come loose and cause serious problems while you're driving.
In general, unless you're confident that your ARP wheel studs are still in good condition and will be properly installed, it's best to err on the side of caution and replace them with new ones. That way you can be sure that your wheels will stay put no matter what.