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12560967 looks like the gm PN for a 4.8 cam shaft. Number on my cam looks like this? Are the 967 numbers on the top the identifier? Just wanted to be positive which grind this was.
1997-2003 LM7 Truck, 2003 LM4, 1999-2000 LQ4
Lift E/I .466/.457
Dur @ .050 190/191
LSA 114 (115.5 For part of 1999)
Timing 112/116 (118/113 for part of 1999)
Part Number 12560967
Source : Chevy LS1/LS6 Performance By Christopher P. Endres