It's still worth it to do, definitely. But you will see much better 1/4 mile times with a shorter geared tranny on that motor. Also, you might want to consider something other than ITR springs, like skunk2 is recommended by portflow. Then get some bigger cams and rev that ***** to 9.5 all day long. As far as what times you are expecting, that depends on a lot. Track condition, where the track is, weather conditions, driver, tires, etc. mid-low 13's I don't think you will hit with the LS tranny and no slicks. The c-speed racing fully built b20vtec ran mid 13's on street tires, and they had some weight reduction too. Check out www.c-speedracing.com and see it for yourself.