I have 964 cams, along with similar mods:
K27-7200
Kokelin IC
1 bar spring
B&B Headers
Custom free flow exhaust.
Dyno reading at 375 rwhp and 372 tq. very happy with results, especially after adding new shorter gearsets for 2, 3 and 4th combined with a black-out Wevo short shift kit.
a blast to drive on the street... next move is concentrate on the suspension and to dump some weight.