The car's previous owners chose the engine builder.
Good point on the ARP studs, I just checked my receipts and it looks like they did use ARP: "
7/16 Rocker Arm Stud 1.750" Black Oxide Coating"
So I need these?
https://www.ebay.com/itm/133759682721
Or since I already have those ARP studs, can I go with poly locks now?
Thanks for the info!