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I'm confused, you have both the before and after runs in hp is that your mistake or is that what the dyno sheet/s read?
ALL figures holden quote are at the flywheel and so by the info you have provided us you have actually gained 74rwkw from the cam and tune
Just got a dyno done today on my l98 6l
max power 369.1 rwhp @ 6559rpm after cam ,convert to kw = 275.24rwkw
max power 270.5 rwhp @ 5842 rpm before cam ,covert to kw = 201.71rwkw
270kw = 362.07hp anyway so really i have only got a gain of 74kw at the wheels!
wow im happy with a 74RWKW gain