Here is the specs of the different C5 model years and LS1/LS6 stock cams

LS1 Lift Duration LSA Timing
97-99 .479/.472 207/199 117 113/121
2000 .500/.500 209/198 115.5 112/119
01-03 .479/.467 207/196 116 117/115
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LS6
2001 .535/.525 211/204 116 114/118
02-03 .551/.555 218/204 117.5 115/120
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Those with a LS1 then can see what they get with going with
a LS6 cam, keep in mind the stock LS6 heads flow about 10 cc more the
LS1 stock heads.

I would not go less then a 114 LSA for most street/track engines if
going with a 3rd party grind for any lower LSA will effect idle quality since smaller LSA creates less idle vaccum.

Team ZR-1
True Custom Performance Tuning
Teamzr1.com