Hi 82hilux,
Regarding camshaft choices… as you know, there are many opinions and experiences with bump sticks in an early Toy engine. You have a good number of choices with a carb’d engine. You also have engnbldr, LCE, and 22RE Performance to get their expert advice. Obviously the guys here who have done it should provide some insightful commentary.
Usually when you go for higher RPM power (HP) you most likely will trade off some lower RPM torque.
with the early engines and the 20/22 hybrid you dont have to worry about losing torque until you get a stupid amount of duration and lift in that cam. like a stage 3 race cam you would lose some take off torque although not as much as you might think but you have 200 hp so who cares
Your selection should take into consideration your carb, head and valves, and exhaust. It's all about volumetric efficiency and flow. 
Correctly tune matching a cam profile to the intake and exhaust systems is not as easy as it may appear.
Gnarls. 
yes it does and works out incredibly well when you spend 30+ hours diligently measuring every aspect of a 20R head, intake and exhaust, then a 22R head intake and exhaust. then having it all flow tested.
