Best way to flush engine after rocker arm failure?

The rocker assembly had no mounting bolts, so I like the ARP stuff so I got 10 5/16 x 2 1/4 bolts and washers.
I found that TR says to use a stud kit TFS-61400613, so I will get one to put back on with. I am wondering if it is an ARP product, the head stud kit form TR was.