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.
Hughes sells the ARP stud kit with all the info required, using them on mine with their tool steel holders.