After years of running bias slicks we now run a M/T pro drag radial. Our car runs better with the radial but it has always hit the tyre hard. Radial has a different set up suspension wise. I've never noticed any difference stability wise but we've never gone over 146 mph but the car is heavy. We usually run 19 psi in the Radials and had to run around 13 in the bias plys to stop wadding them up, We think we may improve with more pressure looking at some of the vids. The radials almost always dead hook with a big wheelie, we've destroyed 2 sump pans so far and damaged headers, steering stuff ,K member and pushed a wing into the door. Switching to Santhuff shocks (from Menscer valved Afco's) was a good move, they really calm the landing down.