After some further thought and consultation with a respected friend I decided that my original answer may have been short on detail.
Therefore:
In production classes, no mix-n-match configurations of a vehicles body panels are allowed. You have to pick a year/model and stick with it.
In production class you have to present a "production" vehicle for inspection. We don't require that you have a real one (matching numbers) but your replica must be aerodynamically identical to a genuine production vehicle, other than the allowable mods spelled out in the rule book.
If you are presenting a vehicle to compete in production supercharged then the body configuration of the vehicle that was supercharged from the factory must be used. If that vehicle had some funky front spoiler you must also have it in place since all genuine production supercharged versions of the car had it from the factory and you are presenting your vehicle as a production vehicle. Non-aerodynamic mods are not required so you don't need a real matching VIN number car but your vehicle must be aerodynamically identical to a stock version of the car you are presenting to compete. You have to take the good with the bad in production class.
Here is an example of what you can't do:
Imagine in 1999 a manufacturer made a supercharged version of a basic model sedan.
The supercharged version came with a different nose, side skirts and a huge whale tail in the rear. all bolt on parts but every supercharged car came with them and none of the N/A cars did.
The base version had a simple nose, no side skirts and no tail.
If you want to enter this body style in Production supercharged it must have all the bodywork that the supercharged version came with. You have to take the good with the bad in production class. You get the supercharger motor but you also get the body kit.
If you want to enter this body style in basic Production it CAN'T have any of the bodywork that only came on the supercharged version. again, you have to take the good with the bad in production class.
No pulling a "clean" nose from a base car, a supercharged engine from a model that only came with a huge nose and whales tail is not production.
Aerodynamics is king in land speed racing so a Production class vehicle MUST have all the misc aerodynamic killing do-dads in place because removing them is what takes you out of the production class.
DW
