Wow Okie!
Looking at the metal around the rod it looks like a fracture rather than wear through. Do you know where the piece(s) is/are? That would be the first thing. If you can find one or a few pieces that make up the missing part then your contamination worries could be lessened. If not, ...................disassembly time or more problems later.
After that it's determine the cause: defective rocker, bad lifter (hydraulic), valve spring bind, bent valve (and what caused that?) or ??????
Edelbrock has a tech line. Have you contacted them?