Could use some help identifying some roller rockers

Oh, and the valve covers appear to have been pretty heavily reworked. Best I can tell, someone machined or ground off the ribs, I just thought there was an option for ones without the ribs. The welded up hole was due to how the casting would have had an opening after removing the ribs and boss there. And the corners were welded and machined to add material so the gasket would seal. All in all, a whole bunch of work.