Slow - upgrading to a stroker (331 or 347) will vastly increase your power output and therefore, your street tires aren't going to be able to handle it. My new 331 and BFG drag radials are ok for the street, but that's about it. I can easily spin the DRs without a problem. I can't imagine putting my BFG Comp TA ZRs back on - it would be a joke.
Keep in mind, my 331 is no 11:1 motor either, rather its 9.2:1 (future D-1SC ProCharger).
NOS - I would say with your mph, your making some great power numbers. Some tuning, better weather, and some suspension tweaking and you've got a real screamer on you hands.
E