Drag Radials vs Slicks

I have 275-60-15 MT street et's on my GTX. I have about 1000 street miles and about 50 passes at the track. Some of this has already been said. They work great on the street. Very sticky which will constantly kick up rocks and dirt. I run them at the track normally with 16.5 lbs. in them. Depending on the track condition, for the most part they hook well. When they don't, they spinn all day no matter what. For the record, my car weighs 3690 with me in it and I'm at about 400 HP to the wheels. I have a 3800 stall converter and automatic with 4;10 rear gears. My best 60 ft. is 1.57 and et is 11.36. I'm going to try slicks this coming season. Also have stock leaf springs in back and subframe connectors.