Kev, i think you're talking about the crankshaft, right?

For the raptor camshafts, you need the decompressioner bits, look around for topics on them, plenty of info on this forum.
About the power delivery, i've compared alot of dyno graphs (raptor and xt) and the raptor stock cam is considerably worse overall than the xt's.
the power is approx. the same, while the xt's has significantly more torque, the raptor cam is just more linear, but i can assure you it's alot less fun.

If you'd pick a hot cam, i'd go for the stage 3 and fit a high compression piston and ported head, this will give a nice progressive torque curve.
Stage 3 cam only will really noticeably rob your torque and put it in the higher rev range and not so well, since the head is unported.

Think about it and decide whether you want torque or a high rpm rush, you can't have both with these motors (unless a turbo is an option