This scares me a bit, I lost my first cam this last summer in my buddy's 340. We purposely went with a lunati/ultradyne sft .842 lobe custom grind since we knew it was a street machine and didn't need an aggressive lobe.
The cam had maybe a few hours run time and was completely trashed, one lifter even had the bottom completely gone. We had all sorts of ideas but no answers but since we had decided to set aside that build and start on his stroker x block we just moved on. The one thing we have in common after reading this thread is we both used howards edm lifters.
That said I am making no accusations but seeing how our cams have similar carnage/low run time/same lifters it requires some looking into. I think we have one decent lifter to possibly check out and maybe the cam as well. Hopefully you will be able to check yours as well, It would be nice to compare our findings, I will post pics later.