Theres a lot going on around the enginebay aero wise (also litarly).
I don’t know why they never gone further over the streamliner concept (Castrol dragster), I think the weight of such body has something to do with it. Also I reckon they had a lot of problems with it which caused a msisfire which eventually caused a body shredding explosion.
Anyway to get back to the headers: in a run a dragster sometimes drops a cylinder, the lack of force at that side of the car causes the car want to go to that side (so for example it drops a cylinder (stops firing) at the left bank, the car turns left) makes you think... it’s not only that but it also gives a lot of ‘downforce’ (I know it’s not the right term but you guys understand what it’s doing). In Funny Cars (the full bodied counterpart of the dragster) they have been experimenting with the header angles for some time now, it gives the drivers a lot of understeer but it also makes them quicker to angle the headers more to the back.
Now back to the rear wing of a dragster, it’s indeed over regulated. You can only run (I think) 3 degrees AoA for example. The dimensions and elements are all regulated. I think the fact that the rear wing is not on top of the rear axle is because when you put it behind it the leverage will also work for you to put even more force on the rear wheels. The cars (I think I already saw a picture of that) are made with a X amount of stiffnes in the chassis which (as far as I know) the less stiff it is the better it is. This also makes the car make an ‘arch’ further down the track.
Indeed the tires are always spinning which ‘we’ call blackstriping. It’s a minimum amount but indeed it’s spinning.
If you want to know some more I’ll follow this post