[BR3W CITY]

DOn't run the comp 918's, they've had a number of bad batches that got brittle and break, even when broke in properly.

As its been said you can pick up a takeout cam and springs
here is the GM listing for some of the cams and springs you can easily find cheap
#12560950 LS6,G3; 207/217 525/525 116 use valve spring 12556513 (LS6)
#12480110 LS1,G3; 226/236 525/525 110 use valve spring 12556513 (LS6)
#12480033 Hotcam; 219/228 525/525 112 use valve spring 12565117
#12565308 LS6 (02-04); 204/218 550/550 117.5 use valve spring 12556513 (LS6)
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I would caution against running a beehive or dual spring because you won't need the extra closing force, and you may end up with excess wear and possibly stuck valves.