Scott, that's one of the reasons I ended up not finishing my 67 Sprint. Back in the early 80's it was next to impossible to find a competnent machinist who knew anything about the OHC, and then try to find a "NEW" cam for one back then.
No internet, no First Gen list, 16 yrs old, and no where to turn... I ended up sending to cam to some place in NY, they welded and reground the cam to specs. New bearings etc... I must have not torqued one of the bearing caps to spec, and it spun a bearing, and damaged the cam, the crank etc... so I shelved that project, and started working on the 68/421 coupe I picked up for $250 http://firstgenfirebird.org/show/closeup.mv?CarID=85 (when I was done)