Valve springs for Howards cam?

Hi:
Ready to order a 712712-08 Howards mechanical flat tappet cam (254/260@050, .599/616 lift, 108 lobe separation) but cant find info about what springs, retainers and locks to use with it on some Edelbrock Performer Rpm heads for LA small block with Proform 1.5 shaft mounted roller rockers.
Will aprettiate any help, thanks.