It is not apples to oranges. Its physics, especially in a ladder bar car or Caltrac type car. The tire is "wadding over itself" because there is to much bite and not enough valving on the extension side of the shock. If it is a leaf spring car taking bite out is not so easy making valving even more critical. The MORE power a car makes and the faster said car is just exacerbates the issue. It's just physics, power does not change the physics of the issue just makes it harder to control.

My street car responds EXACTLY the same way, on a 10.5" tire running low 10's in Vegas at 3600lbs, as did my Belvedere running even slower. Control of the housing is what you need not more air. You mask the issue with more air because you are not controlling the rear end housing. Cheap shocks will not control the housing at all. Worked on every car I have been around and helped with. Starts with rear set up and shocks. The tires on the dragster have been on it for over a year and have 190+ laps on them.

The OP's car is actually a mid 9 second car, with ladder bars. The air in Vegas is not kind to ET's. I have watched the OP's car make a few passes and will GUARANTEE if he gets better control over the rear end housing with more extension valving the tires will be much happier and the car will be quicker period.

Topics like this really make me miss Monte.......