Pretty sure rusty recommended the Hughes tied shaft style rockers...they're a little on the pricey side, but you pay for quality and they bolt directly to the magnum Edelbrock castings...and they're adjustable.
well..they do bolt on to the eddy magnum head...but you need to remove the heil coil thread insert where the stud bolts into the head....then you need to put a new tread insert in the head...
then the hughes magnum rockers will work on a eddy magnum head.