Most LS1 6 speeds with with a decent driver can run anywhere in the 13.0-13.8 range at the track. As for the autos the norm is 13.5-13.9 depending on mods to the transmission. I have seen way worse with both.
I have a 00 SS and with SLP Suspension, SLP/BW Lid and filter, SLP Cat-Back and SLP...