Need valve train advice 318...

The 273 rockers have an interference fit adjuster, they are supposed to be tight so they dont loosen on their own that is why they have no lock nut. The Edelbrock springs are not that beefy, I run a Edelbrock RPM cam and they tell me not to use double springs, (ie stiff) so I am betting Edelbrock heads have compatible springs for an edelbrock cam which cant use a stiff spring, so they are probably OK, but youll have to check Lunati and see what their open anc closed seat pressure recommendations are. How high are you going to rev it?