I checked my H-O catalogs....
It looks like the 068k was an exact duplicate grind as Pontiac's 9779068 cam
The HC-01 was similar but with a little more lift on the exhaust lobes to help out on that end.
The 041k appears to be an exact duplicate of Pontiac's 9794041 cam.
The HC-02 does the same thing as the HC-01....little more help on the exhaust lobes.
The HC-03 is a high lift version of the 041 with more lift on both intake and exhaust.
I would agree with the earlier suggestion....it appears the H-O cams were very much influenced by the original Pontiac grinds
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