I don't respond to direct questions if I don't have input that will help, or a joke to lighten the mood and bump it up in hopes someone else can answer.
I don't have a stroker SB and I have no idea what HP an 833 will hold.
I bet the answer to the second question is similar to the ones you get for rears, driveshafts, clutches etc. IT DEPENDS.
Since HP is work and torque is the force, it's really torque that matters. It also depends on what the car weighs, what tires are under it and other variables that define the rock (engine torque) and the hard place (traction) you are subjecting the item in question.