I have a 56 292 that I am building.  Had the block tanked, bored, new cam bearings.  Went to put the new Isky cam in, no bueno.  It fit the first 4 cam bearing a little snug.  When it started into the 5th it bound up hard.  The cam looked good when I cut the oil groove deeper, but I did not put a mic on it.
  I still have the old cam.  It had quite a few miles on it, and a couple flat lobes.  I can get it into all 5 bearings, but it is a lot tighter than I would run it... Cannot turn it over by hand.  I have seen where people cut a cross grove into the old cams bearing journals, and use it as a reamer to open up the new bearings.  Is this a good idea?  Anyone know something better to do?

Paul