I've also been running Hoosier radial slicks on my car. Because they don't grow any significant amount like bias ply, you will see higher rpm's at the finish line if using the same size tire. They should be run at higher pressures than bias ply. I found 21 lbs on a 10" rim to work best for my particular combo. You may also feel a firmer "snap" off the line and your RT's may get a bit quicker. ET's should be faster as well - .05-.10 are typical. *** The only downside to radial slicks is that they are more sensitive to track conditions. If the track surface is "marginal", a radial slick will spin sooner and longer than a bias ply under the same conditions. I run them all the time because I don't like to change the car or my routine if I ran bias ply and had a heads-up run. Fortunately, track prep has been very good at the IHRA events I attend. But I have had some consistency problems at local bracket races.
Hoosier has a wide range of radial and bias ply slicks to choose from.
Hoosier drag race tires. Contact your closest distributor for dealer locations:
Hoosier distributor map. 
Well, I couldn't get the distributor link to work right, but this is the closest distributor to Michigan:
Hoosier Tire Midwest- Plymouth
1801 Jim Neu Drive
Plymouth, IN 46563
Phone (574) 936-8344
Fax (574) 936-1673
E-mail:
hoosiertireply@aim.com 
