a bigger cam that stock will definatly make more HP, but at higher RPMs.
the question is not how much HP it will add. but is the motor setup to effectivly rev to those RPM where the cam starts working and making power.... and in the topic makers case i think his car can and then some
but i would say the B cam should add around 15-20 HP or soi think the B cam is a good street cam. Sounds good, not too radical top where the car cant idle and from what i see it works. as people still use the cam to this day even though how "old" it is....
but also as stated above, there are some better choices, i hear the TFS stage 2 is pretty mean, i think the motor is good for a a tfs2 cam