eddy rpm heads with screwed up valve cover bolts

I would take a set of junk steel valve covers and weld tubes on that have a bore that is needed for a 1/4" helicoil. Make sure all the tubes are straight and weld a gusset at the top to keep it all centered and 90 degrees. Drill away and insert 10 helicoils. Dont go to deep, you may hit a port. Also take pictures and send them to Vic Edelbrock for some cash back maybe.