I know lots of stuff. Just nothing about those cams...
If you think about it though, more than likely Blox just copied some other manufacturer and used similar specs. I doubt the cams will disinigrate in your engine though, or cause any harm what-so-ever. Like many people have said before, companies like OBX, ractive, etc. just save money on R&D and copy other peoples shit with cheaper material. I'm willing to bet they are made by a major manufacturer for Blox. Try them out for us and let us know....