Milodon studs don’t have the hex for installing them in the block, like arp. Install a set in a procharged small block Ford because I couldn’t get arp either. They work out well! Years ago milodon studs use to be the go to stud.
As we all know if and when you have to remove the heads in the car, especially an un-modified street car the hex provision worked out great to remove the studs, then the heads. I used to put a nut on the studs and grind a notch so I could reach in with a screwdriver to remove them. Of course this is done before assembly
