How can i improve my 0-60 and quarter mile times?

I've got a 97 Pontiac Trans Am WS6. its an auto (yes i know boo hoo). 285 bhp from the LT1 and with the WS6 package with the intake and exhaust is suppose to give it an extra 20 horse to give it a total of 305 bhp from the factory. Its completely stock except the rear end has been changed to 4.10 instead of the 3.43. Its also got a b&m shift kit in it aswell. The car stock is apparently able to pull off a 0-60 time in 5-6 seconds. I tried doing a run and my friends timed it to be 7 seconds. (who knows how accurate that is) i had another friend say 4 or 5 on a diff ocion. Will warming my BFGs up before i take off help out a lot? It seems as though my biggest problem is at the start. Im getting traction. the tires aren't spinning but when i pin it, the first few seconds it seems as though the car is slow to respond. Do i need drag radials? What can i do to get this time down?