true^^

if he has the spec A's, then they are just a little more aggressive than ITR/CTR cams. So yes he could throw them in a stock motor.

Spec B's, he would need a minimum of 11.5:1 to even get any type of power out of them. Recommended is 12:1 If you want to use the full potential of these cams, these are rated at 12mm lift. You would also need the valvetrain that can withstand these, toda's are always a good choice but they are expensive, so you could you use supertech HD kit, these have similar specs to todas but have a higher coilbind.

Spec C's, no way in a stock motor, it would be pointless.