Helping with a cam install on a Chevy small block. Fresh machine work etc. New cam bearings etc etc. Tried to put cam in and no go. Then tied a stock cam--no problem. Friend took back to machine shop. He tried the same--stock cam ok, after market NG. Lobes higher than bearing surface by .005 to .010 larger!! Never seen this before--returned cam and waiting for another. Anyone seen this before?