I have two sets of NOS cam bearings for my engine to choose from.
The camshaft is a Howards with .515" lift springs, will be 280 lbs open pressure
The sets are #1 NOS Clevite 77   SH 559S      set #2 is old NOS Durabond F9a 
I plan on grooving the block cam journal like Ted Eaton has shown
Is one set preferred over the other?
THANKS!