I contacted arp a couple months ago about bolts for indy heads.
Here is why i got
"I am sorry, but ARP does not offer a head stud kit for your application . We would need dimensions from the head and the block. I attached a pdf of the calculation sheet, letters C,F,G,H,I are the measurements I would need. if you can get me that information I can see if they have a stud off the shelf that will work for your application."
Some reason I can't get the pic
But " Google arp stud calculation"