Eddy heads on 416 stroker question

I run Comp Cams Pro Magnum steel rocker arms with Hughs Hold Down Kit. I bought the hold down kit from Mancini Racing. I had to upgrade my springs and also upgraded to 10 degree retainers and locks. Make sure you run a steel shim under those springs or the spring will dig into the head. I also had to egg out the push rod holes. You should have a shop go over the valve job and fine tune the valve guide clearance. These heads are mass produced with cost containment a priority so have a good shop look them over.