How many street miles can I expect....

I there are other cam companies out there with intergrated cast iron gear on it. I had the same problem and just ended up buying a crane cam and had it reworked to different specs and using a hardened intermiate shaft. This is after I spent the better part of two days trying to track down a shaft that would work with a billet/steel cam. On day three I crane informed me that they using intergrated cams, they got me business to the tune of $400.